31393716 has 12 divisors (see below), whose sum is σ = 73252032. Its totient is φ = 10464568.

The previous prime is 31393709. The next prime is 31393751. The reversal of 31393716 is 61739313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308060 + ... + 1308083.

It is an arithmetic number, because the mean of its divisors is an integer number (6104336).

Almost surely, 2^31393716 is an apocalyptic number.

It is an amenable number.

31393716 is an abundant number, since it is smaller than the sum of its proper divisors (41858316).

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

31393716 is a wasteful number, since it uses less digits than its factorization.

31393716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616150 (or 2616148 counting only the distinct ones).

The product of its digits is 10206, while the sum is 33.

The square root of 31393716 is about 5603.0095484480. The cubic root of 31393716 is about 315.4623796588.

The spelling of 31393716 in words is "thirty-one million, three hundred ninety-three thousand, seven hundred sixteen".