31939696 has 20 divisors (see below), whose sum is σ = 63201312. Its totient is φ = 15629696.

The previous prime is 31939693. The next prime is 31939717. The reversal of 31939696 is 69693913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31939693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20485 + ... + 21988.

Almost surely, 2^31939696 is an apocalyptic number.

It is an amenable number.

31939696 is a deficient number, since it is larger than the sum of its proper divisors (31261616).

31939696 is a wasteful number, since it uses less digits than its factorization.

31939696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42528 (or 42522 counting only the distinct ones).

The product of its digits is 236196, while the sum is 46.

The square root of 31939696 is about 5651.5215650301. The cubic root of 31939696 is about 317.2806545012.

The spelling of 31939696 in words is "thirty-one million, nine hundred thirty-nine thousand, six hundred ninety-six".