31868512 has 24 divisors (see below), whose sum is σ = 67568256. Its totient is φ = 14708352.

The previous prime is 31868479. The next prime is 31868513. The reversal of 31868512 is 21586813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37888 + ... + 38719.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^31868512 is an apocalyptic number.

31868512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31868512 is an abundant number, since it is smaller than the sum of its proper divisors (35699744).

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

31868512 is a wasteful number, since it uses less digits than its factorization.

31868512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76630 (or 76622 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 31868512 is about 5645.2202791388. The cubic root of 31868512 is about 317.0447713801.

The spelling of 31868512 in words is "thirty-one million, eight hundred sixty-eight thousand, five hundred twelve".