31974864 has 20 divisors (see below), whose sum is σ = 82601856. Its totient is φ = 10658272.

The previous prime is 31974851. The next prime is 31974869. The reversal of 31974864 is 46847913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31974869) 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, 333024 + ... + 333119.

Almost surely, 2^31974864 is an apocalyptic number.

It is an amenable number.

31974864 is an abundant number, since it is smaller than the sum of its proper divisors (50626992).

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

31974864 is a wasteful number, since it uses less digits than its factorization.

31974864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666154 (or 666148 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 31974864 is about 5654.6320835223. The cubic root of 31974864 is about 317.3970617170.

It can be divided in two parts, 31974 and 864, that multiplied together give a square (27625536 = 5256²).

The spelling of 31974864 in words is "thirty-one million, nine hundred seventy-four thousand, eight hundred sixty-four".