31814864 has 20 divisors (see below), whose sum is σ = 62954304. Its totient is φ = 15568608.

The previous prime is 31814843. The next prime is 31814879. The reversal of 31814864 is 46841813.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 20402 + ... + 21905.

Almost surely, 2^31814864 is an apocalyptic number.

It is an amenable number.

31814864 is a deficient number, since it is larger than the sum of its proper divisors (31139440).

31814864 is a wasteful number, since it uses less digits than its factorization.

31814864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42362 (or 42356 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 31814864 is about 5640.4666473617. The cubic root of 31814864 is about 316.8667652535.

The spelling of 31814864 in words is "thirty-one million, eight hundred fourteen thousand, eight hundred sixty-four".