31264872 has 32 divisors (see below), whose sum is σ = 78511680. Its totient is φ = 10375040.

The previous prime is 31264841. The next prime is 31264897. The reversal of 31264872 is 27846213.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2797 + ... + 8387.

It is an arithmetic number, because the mean of its divisors is an integer number (2453490).

Almost surely, 2^31264872 is an apocalyptic number.

It is a pronic number, being equal to 5591×5592.

It is an amenable number.

31264872 is an abundant number, since it is smaller than the sum of its proper divisors (47246808).

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

31264872 is a wasteful number, since it uses less digits than its factorization.

31264872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833 (or 5829 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 31264872 is about 5591.4999776446. The cubic root of 31264872 is about 315.0302213383.

The spelling of 31264872 in words is "thirty-one million, two hundred sixty-four thousand, eight hundred seventy-two".