31004904 has 32 divisors (see below), whose sum is σ = 88585920. Its totient is φ = 8858496.

The previous prime is 31004873. The next prime is 31004917. The reversal of 31004904 is 40940013.

It is a super-2 number, since 2×31004904² = 1922608144098432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92109 + ... + 92444.

It is an arithmetic number, because the mean of its divisors is an integer number (2768310).

Almost surely, 2^31004904 is an apocalyptic number.

It is an amenable number.

31004904 is an abundant number, since it is smaller than the sum of its proper divisors (57581016).

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

31004904 is a wasteful number, since it uses less digits than its factorization.

31004904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184569 (or 184565 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 31004904 is about 5568.2047376152. The cubic root of 31004904 is about 314.1546292375.

Adding to 31004904 its reverse (40940013), we get a palindrome (71944917).

The spelling of 31004904 in words is "thirty-one million, four thousand, nine hundred four".