31372864 has 14 divisors (see below), whose sum is σ = 62255654. Its totient is φ = 15686400.

The previous prime is 31372811. The next prime is 31372889. The reversal of 31372864 is 46827313.

It is a happy number.

31372864 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 31270464 + 102400 = 5592^2 + 320^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 245037 + ... + 245164.

Almost surely, 2^31372864 is an apocalyptic number.

It is an amenable number.

31372864 is a deficient number, since it is larger than the sum of its proper divisors (30882790).

31372864 is an equidigital number, since it uses as much as digits as its factorization.

31372864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490213 (or 490203 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 31372864 is about 5601.1484536656. The cubic root of 31372864 is about 315.3925198342.

The spelling of 31372864 in words is "thirty-one million, three hundred seventy-two thousand, eight hundred sixty-four".