29131900 has 36 divisors (see below), whose sum is σ = 72248848. Its totient is φ = 9987840.

The previous prime is 29131873. The next prime is 29131903. The reversal of 29131900 is 913192.

It is a super-2 number, since 2×29131900² = 1697335195220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29131903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20109 + ... + 21508.

Almost surely, 2^29131900 is an apocalyptic number.

29131900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29131900 is an abundant number, since it is smaller than the sum of its proper divisors (43116948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29131900 is a wasteful number, since it uses less digits than its factorization.

29131900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41638 (or 41631 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 29131900 is about 5397.3975210281. The cubic root of 29131900 is about 307.6967696468.

The spelling of 29131900 in words is "twenty-nine million, one hundred thirty-one thousand, nine hundred".