30000 (number)

30,000 (thirty thousand) is the natural number that comes after 29,999 and before 30,001.

Selected numbers in the range 30000–39999

• 30000 – round number
• 30029 – primorial prime
• 30030 – primorial^[1]
• 30203 – safe prime
• 30240 – harmonic divisor number^[2]
• 30323 – Sophie Germain prime and safe prime
• 30420 – pentagonal pyramidal number^[3]
• 30694 – open meandric number
• 30941 – first base 13 repunit prime
• 31116 – octahedral number^[4]
• 31337 – cousin prime, pronounced elite, an alternate way to spell 1337, an obfuscated alphabet made with numbers and punctuation, known and used in the gamer, hacker and BBS cultures.
• 31395 – square pyramidal number
• 31397 – prime number followed by a record prime gap of 72, the first above 52^[5]
• 31721 – start of a prime quadruplet^[6]
• 31929 – Zeisel number^[7]
• 32043 – smallest number whose square is pandigital.
• 32045 – can be expressed as a sum of two squares in more ways than any smaller number^[8]
• 32760 – harmonic divisor number^[2]
• 32761 – 181², centered hexagonal number
• 32767 – 2¹⁵ − 1, largest positive value for a signed (two's complement) 16-bit integer on a computer.
• 32768 – 2¹⁵, maximum absolute value of a negative value for a signed (two's complement) 16-bit integer on a computer.
• 32800 – pentagonal pyramidal number^[3]
• 32993 – Leyland number^[9]
• 33461 – Pell number,^[10] Markov number^[11]
• 33511 – square pyramidal number
• 33781 – octahedral number^[4]
• 34560 – 5 superfactorial^[12]
• 34841 – start of a prime quadruplet^[6]
• 34969 – favorite number of the Muppet character Count von Count ^[13]
• 35720 – square pyramidal number
• 35840 – number of ounces in a long ton (2,240 pounds)
• 35890 – tribonacci number^[14]
• 35899 – alternating factorial^[15]
• 35937 – 33³, chiliagonal number^[16]
• 35964 – digit-reassembly number
• 36100 – sum of the cubes of the first 19 positive integers
• 36594 – octahedral number^[4]
• 37378 – semi-meandric number^[17]
• 37666 – Markov number^[11]
• 37926 – pentagonal pyramidal number^[3]
• 38024 – square pyramidal number
• 38416 – 14⁴
• 38962 – Kaprekar number^[18]
• 39304 – 34³
• 39559 – octahedral number^[4]
• 39648 – tetranacci number^[19]

References