30,000 (thirty thousand) is the natural number that comes after 29,999 and before 30,001.
Selected numbers in the range 30001–39999
30001 to 30999 30029 = primorial prime 30030 = primorial 30031 = smallest composite number which is one more than a primorial 30203 = safe prime 30240 = harmonic divisor number, smallest 4-perfect number 30323 = Sophie Germain prime and safe prime 30420 = pentagonal pyramidal number 30537 = Riordan number 30694 = open meandric number 30941 = first base 13 repunit prime
31000 to 31999 31116 = octahedral number 31185 = number of partitions of 39 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 greater than 52 31688 = the number of years approximately equal to 1 trillion seconds 31721 = start of a prime quadruplet
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 (two's complement) 16-bit integer on a computer. 32768 = 215 = 85 = 323, maximum absolute value of a negative value for a signed (two's complement) 16-bit integer on a computer. 32800 = pentagonal pyramidal number 32993 = Leyland prime using 2 & 15 (215 + 152)
33000 to 33999 33461 = Pell number, Markov number 33511 = square pyramidal number 33781 = octahedral number
34000 to 34999 34560 = 5 superfactorial 34790 = number of non-isomorphic set-systems of weight 13. 34841 = start of a prime quadruplet 34969 = 1872, favorite number of the Muppet character Count von Count
35000 to 35999 35720 = square pyramidal number 35890 = tribonacci number 35899 = alternating factorial 35964 = digit-reassembly number
36000 to 36999 36100 = sum of the cubes of the first 19 positive integers 36594 = octahedral number
37000 to 37999 37338 = number of partitions of 40 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 38305 = the largest Forges-compatible number (for index 32) to the field . But a conjecture of Viggo Brun predicts that there are infinitely many such numbers for any Galois field unless is bad. 38501 = Smallest prime separated by at least 40 from the nearest primes (38461 and 38543). It is thus an isolated prime. Chen prime. 38807 = number of non-equivalent ways of expressing 10,000,000 as the sum of two prime numbers 38962 = Kaprekar number
39000 to 39999 39299 = Integer connected with coefficients in expansion of Weierstrass P-function 39559 = octahedral number 39648 = tetranacci number
Primes There are 958 prime numbers between 30,000 and 40,000.
References