31864396 has 12 divisors (see below), whose sum is σ = 56595448. Its totient is φ = 15694272.

The previous prime is 31864379. The next prime is 31864397. The reversal of 31864396 is 69346813.

It is not an unprimeable number, because it can be changed into a prime (31864397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59181 + ... + 59716.

Almost surely, 2^31864396 is an apocalyptic number.

It is an amenable number.

31864396 is a deficient number, since it is larger than the sum of its proper divisors (24731052).

31864396 is a wasteful number, since it uses less digits than its factorization.

31864396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118968 (or 118966 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 31864396 is about 5644.8557111763. The cubic root of 31864396 is about 317.0311214126.

The spelling of 31864396 in words is "thirty-one million, eight hundred sixty-four thousand, three hundred ninety-six".