31904968 has 32 divisors (see below), whose sum is σ = 61696800. Its totient is φ = 15458688.

The previous prime is 31904947. The next prime is 31904969. The reversal of 31904968 is 86940913.

It is a self number, because there is not a number n which added to its sum of digits gives 31904968.

It is not an unprimeable number, because it can be changed into a prime (31904969) 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 7 ways as a sum of consecutive naturals, for example, 55788 + ... + 56356.

It is an arithmetic number, because the mean of its divisors is an integer number (1928025).

Almost surely, 2^31904968 is an apocalyptic number.

It is an amenable number.

31904968 is a deficient number, since it is larger than the sum of its proper divisors (29791832).

31904968 is a wasteful number, since it uses less digits than its factorization.

31904968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 31904968 is about 5648.4482824932. The cubic root of 31904968 is about 317.1656198178.

The spelling of 31904968 in words is "thirty-one million, nine hundred four thousand, nine hundred sixty-eight".