# 10000000 (number)

10000000
Cardinal Ten million
Ordinal 10000000th
(ten millionth)
Factorization 27 · 57
Roman numeral X
Greek prefix hebdo-
Binary 1001100010010110100000002
Ternary 2002110011021013
Quaternary 2120211220004
Quinary 100300000005
Senary 5542001446
Octal 461132008
Duodecimal 342305412
Vigesimal 32A00020
Base 36 5YC1S36

Ten million (10,000,000) is the natural number following 9,999,999 and preceding 10,000,001.

In scientific notation, it is written as 107.

In South Asia, it is known as the crore.

## Selected 8-digit numbers (10,000,001–99,999,999)

• 10077696 = 69
• 10609137Leyland number
• 11111111repunit
• 11436171Keith number[1]
• 11485154Markov number
• 11881376 = 265
• 12960000 = 604, (3·4·5)4, Plato's "nuptial number" (Republic VIII; see regular number)
• 12648430 – hexadecimal C0FFEE, resembling the word "coffee"; used as a placeholder in computer programming, see hexspeak.
• 12988816 = the number of different ways of covering an 8-by-8 square with 32 1-by-2 dominoes
• 13782649 – Markov number
• 11390625 = 156
• 14348907 = 315
• 14352282 – Leyland number
• 14930352Fibonacci number[2]
• 15485863 – 1,000,000th prime number
• 15994428Pell number[3]
• 16609837 – Markov number
• 16769023Carol prime[4] and an emirp
• 16777216 = 224hexadecimal "million" (0x1000000), number of possible colors in 24/32-bit Truecolor computer graphics
• 16777792 – Leyland number
• 16785407Kynea number[5]
• 16797952 – Leyland number
• 16964653 – Markov number
• 17210368 = 285
• 17650828 = 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88
• 18199284Motzkin number[6]
• 19487171 = 117
• 19680277Wedderburn-Etherington number[7]
• 19987816 – palindromic in 3 consecutive bases: 41AAA1413, 292429214, 1B4C4B115
• 20031170 – Markov number
• 20511149 = 295
• 21531778 – Markov number
• 21621600colossally abundant number,[8] superior highly composite number[9]
• 22222222repdigit
• 24137569 = 176
• 24157817 – Fibonacci number,[2] Markov number
• 24300000 = 305
• 24678050 – equal to the sum of the eighth powers of its digits
• 27644437Bell number[10]
• 28629151 = 315
• 31536000 – standard number of seconds in a non-leap year (omitting leap seconds)
• 31622400 – standard number of seconds in a leap year (omitting leap seconds)
• 33333333 – repdigit
• 33445755 – Keith number[1]
• 33550336 – fifth perfect number[11]
• 33554432 = 225 – Leyland number
• 33555057 – Leyland number
• 34012224 = 186
• 35831808 = 127
• 36614981alternating factorial[12]
• 38613965 – Pell number,[3] Markov number
• 39088169 – Fibonacci number[2]
• 39135393 = 335
• 39916800 = 11!
• 39916801factorial prime[13]
• 40353607 = 79
• 43046721 = 316
• 43050817 – Leyland number
• 43112609Mersenne prime exponent
• 43443858 – palindromic in 3 consecutive bases: 3C323C315, 296E69216, 1DA2AD117
• 43484701 – Markov number
• 44121607 – Keith number[1]
• 44444444 – repdigit
• 45136576 – Leyland number
• 45435424 = 345
• 46026618 – Wedderburn-Etherington number[7]
• 46656000 = 3603
• 47045881 = 196
• 48828125 = 511
• 48928105 – Markov number
• 48989176 – Leyland number
• 50852019 – Motzkin number[6]
• 52521875 = 355
• 55555555 – repdigit
• 60466176 – 610
• 61466176 – Leyland number
• 62748517 = 137
• 63245986 – Fibonacci number, Markov number
• 64000000 = 206vigesimal "million" (1 alau in Mayan, 1 poaltzonxiquipilli in Nahuatl)
• 66666666 – repdigit
• 67092479 – Carol number[14]
• 67108864 = 226
• 67109540 – Leyland number
• 67125247 – Kynea number[5]
• 67137425 – Leyland number
• 69343957 = 375
• 73939133 – the largest prime number that can be 'tailed' again and again by removing its last digit to produce only primes
• 77777777 – repdigit
• 78442645 – Markov number
• 79235168 = 385
• 85766121 – 216
• 87539319taxicab number[15]
• 88888888 – repdigit
• 90224199 = 395
• 93222358 – Pell number[3]
• 94418953 – Markov number
• 99999989 - Greatest prime number with 8 digits[16]
• 99999999 – repdigit, Friedman number, believed to be smallest number to be both repdigit and Friedman

## References

1. "Sloane's A007629 : Repfigit (REPetitive FIbonacci-like diGIT) numbers (or Keith numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
2. "Sloane's A000045 : Fibonacci numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
3. "Sloane's A000129 : Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
4. "Sloane's A091516 : Primes of the form 4^n - 2^(n+1) - 1". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
5. "Sloane's A093069 : a(n) = (2^n + 1)^2 - 2". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
6. "Sloane's A001006 : Motzkin numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
7. "Sloane's A001190 : Wedderburn-Etherington numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
8. "Sloane's A004490 : Colossally abundant numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
9. "Sloane's A002201 : Superior highly composite numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
10. "Sloane's A000110 : Bell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
11. "Sloane's A000396 : Perfect numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
12. "Sloane's A005165 : Alternating factorials". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
13. "Sloane's A088054 : Factorial primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
14. "Sloane's A093112 : a(n) = (2^n-1)^2 - 2". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
15. "Sloane's A011541 : Taxicab, taxi-cab or Hardy-Ramanujan numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-17.
16. "greatest prime number with 8 digits". Wolfram Alpha. Retrieved June 4, 2014.