31690564 has 12 divisors (see below), whose sum is σ = 55896064. Its totient is φ = 15720264.

The previous prime is 31690559. The next prime is 31690577. The reversal of 31690564 is 46509613.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30684 + ... + 31699.

Almost surely, 2^31690564 is an apocalyptic number.

It is an amenable number.

31690564 is a deficient number, since it is larger than the sum of its proper divisors (24205500).

31690564 is a wasteful number, since it uses less digits than its factorization.

31690564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62514 (or 62512 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 31690564 is about 5629.4372720548. The cubic root of 31690564 is about 316.4535627468.

It can be divided in two parts, 316905 and 64, that added together give a square (316969 = 563²).

The spelling of 31690564 in words is "thirty-one million, six hundred ninety thousand, five hundred sixty-four".