31945396 has 24 divisors (see below), whose sum is σ = 65451456. Its totient is φ = 13356480.

The previous prime is 31945387. The next prime is 31945411. The reversal of 31945396 is 69354913.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 12766 + ... + 15061.

It is an arithmetic number, because the mean of its divisors is an integer number (2727144).

Almost surely, 2^31945396 is an apocalyptic number.

It is an amenable number.

31945396 is an abundant number, since it is smaller than the sum of its proper divisors (33506060).

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

31945396 is a wasteful number, since it uses less digits than its factorization.

31945396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27879 (or 27877 counting only the distinct ones).

The product of its digits is 87480, while the sum is 40.

The square root of 31945396 is about 5652.0258315050. The cubic root of 31945396 is about 317.2995274857.

The spelling of 31945396 in words is "thirty-one million, nine hundred forty-five thousand, three hundred ninety-six".