31996968 has 32 divisors (see below), whose sum is σ = 80203200. Its totient is φ = 10637568.

The previous prime is 31996961. The next prime is 31996973. The reversal of 31996968 is 86969913.

It is a super-2 number, since 2×31996968² = 2047611922386048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31996968.

It is not an unprimeable number, because it can be changed into a prime (31996961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8853 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (2506350).

Almost surely, 2^31996968 is an apocalyptic number.

It is an amenable number.

31996968 is an abundant number, since it is smaller than the sum of its proper divisors (48206232).

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

31996968 is a wasteful number, since it uses less digits than its factorization.

31996968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3517 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 31996968 is about 5656.5862496739. The cubic root of 31996968 is about 317.4701829936.

The spelling of 31996968 in words is "thirty-one million, nine hundred ninety-six thousand, nine hundred sixty-eight".