31690968 has 32 divisors (see below), whose sum is σ = 81961200. Its totient is φ = 10199168.

The previous prime is 31690931. The next prime is 31691017. The reversal of 31690968 is 86909613.

It is a congruent number.

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, 22071 + ... + 23462.

Almost surely, 2^31690968 is an apocalyptic number.

It is an amenable number.

31690968 is an abundant number, since it is smaller than the sum of its proper divisors (50270232).

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

31690968 is a wasteful number, since it uses less digits than its factorization.

31690968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45571 (or 45567 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 31690968 is about 5629.4731547455. The cubic root of 31690968 is about 316.4549074867.

The spelling of 31690968 in words is "thirty-one million, six hundred ninety thousand, nine hundred sixty-eight".