30,000

Selected numbers in the range 30001–39999

30001 to 30999

• 30029 – primorial prime
• 30030 – primorial
• 30203 – safe prime
• 30240 – harmonic divisor number
• 30323 – Sophie Germain prime and safe prime
• 30420 – pentagonal pyramidal number
• 30694 – open meandric number
• 30941 – first base 13 repunit prime

  31000 to 31999

• 31116 – octahedral number
• 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
• 31721 – start of a prime quadruplet
• 31929 – Zeisel number

  32000 to 32999

• 32043 – smallest number whose square is pandigital.
• 32045 – can be expressed as a sum of two squares in more ways than any smaller number
• 32760 – harmonic divisor number
• 32761 – 181², centered hexagonal number
• 32767 – 2¹⁵ − 1, largest positive value for a signed 16-bit integer on a computer.
• 32768 – 2¹⁵, maximum absolute value of a negative value for a signed 16-bit integer on a computer.
• 32800 – pentagonal pyramidal number
• 32993 – Leyland number

  33000 to 33999

• 33333 – repdigit
• 33461 – Pell number, Markov number
• 33511 – square pyramidal number
• 33781 – octahedral number

  34000 to 34999

• 34560 – 5 superfactorial
• 34841 – start of a prime quadruplet
• 34969 – favorite number of the Muppet character Count von Count

  35000 to 35999

• 35720 – square pyramidal number
• 35840 – number of ounces in a long ton
• 35890 – tribonacci number
• 35899 – alternating factorial
• 35937 – 33³, chiliagonal number
• 35964 – digit-reassembly number

  36000 to 36999

• 36100 – sum of the cubes of the first 19 positive integers
• 36594 – octahedral number

  37000 to 37999

• 37378 – semi-meandric number
• 37634 – third term of the Lucas–Lehmer sequence
• 37666 – Markov number
• 37926 – pentagonal pyramidal number

  38000 to 38999

• 38024 – square pyramidal number
• 38416 – 14⁴
• 38962 – Kaprekar number

  39000 to 39999

• 39304 – 34³
• 39559 – octahedral number
• 39648 – tetranacci n