31349864 has 32 divisors (see below), whose sum is σ = 72347520. Its totient is φ = 12401856.

The previous prime is 31349831. The next prime is 31349873. The reversal of 31349864 is 46894313.

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, 20804 + ... + 22259.

It is an arithmetic number, because the mean of its divisors is an integer number (2260860).

Almost surely, 2^31349864 is an apocalyptic number.

It is an amenable number.

31349864 is an abundant number, since it is smaller than the sum of its proper divisors (40997656).

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

31349864 is a wasteful number, since it uses less digits than its factorization.

31349864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43089 (or 43085 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 31349864 is about 5599.0949268609. The cubic root of 31349864 is about 315.3154277187.

The spelling of 31349864 in words is "thirty-one million, three hundred forty-nine thousand, eight hundred sixty-four".