31872896 has 32 divisors (see below), whose sum is σ = 69272280. Its totient is φ = 14487040.

The previous prime is 31872889. The next prime is 31872901. The reversal of 31872896 is 69827813.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9911 + ... + 12726.

Almost surely, 2^31872896 is an apocalyptic number.

It is an amenable number.

31872896 is an abundant number, since it is smaller than the sum of its proper divisors (37399384).

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

31872896 is a wasteful number, since it uses less digits than its factorization.

31872896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22662 (or 22650 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 31872896 is about 5645.6085588712. The cubic root of 31872896 is about 317.0593088285.

It can be divided in two parts, 31872 and 896, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 31872896 in words is "thirty-one million, eight hundred seventy-two thousand, eight hundred ninety-six".