31118904 has 40 divisors (see below), whose sum is σ = 87163560. Its totient is φ = 10372752.

The previous prime is 31118869. The next prime is 31118909. The reversal of 31118904 is 40981113.

It is a super-2 number, since 2×31118904² = 1936772372322432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31118909) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23364 + ... + 24659.

It is an arithmetic number, because the mean of its divisors is an integer number (2179089).

Almost surely, 2^31118904 is an apocalyptic number.

It is an amenable number.

31118904 is an abundant number, since it is smaller than the sum of its proper divisors (56044656).

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

31118904 is a wasteful number, since it uses less digits than its factorization.

31118904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48041 (or 48028 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 31118904 is about 5578.4320377683. The cubic root of 31118904 is about 314.5391901609.

The spelling of 31118904 in words is "thirty-one million, one hundred eighteen thousand, nine hundred four".