31897364 has 12 divisors (see below), whose sum is σ = 55860000. Its totient is φ = 15937368.

The previous prime is 31897363. The next prime is 31897373. The reversal of 31897364 is 46379813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31897363) 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, 9137 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (4655000).

Almost surely, 2^31897364 is an apocalyptic number.

It is an amenable number.

31897364 is a deficient number, since it is larger than the sum of its proper divisors (23962636).

31897364 is a wasteful number, since it uses less digits than its factorization.

31897364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5662 (or 5660 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 31897364 is about 5647.7751371668. The cubic root of 31897364 is about 317.1404208268.

The spelling of 31897364 in words is "thirty-one million, eight hundred ninety-seven thousand, three hundred sixty-four".