31876872 has 16 divisors (see below), whose sum is σ = 79692240. Its totient is φ = 10625616.

The previous prime is 31876849. The next prime is 31876877. The reversal of 31876872 is 27867813.

It is a super-2 number, since 2×31876872² = 2032269937008768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31876877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664078 + ... + 664125.

It is an arithmetic number, because the mean of its divisors is an integer number (4980765).

Almost surely, 2^31876872 is an apocalyptic number.

It is an amenable number.

31876872 is an abundant number, since it is smaller than the sum of its proper divisors (47815368).

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

31876872 is a wasteful number, since it uses less digits than its factorization.

31876872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328212 (or 1328208 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 31876872 is about 5645.9606799906. The cubic root of 31876872 is about 317.0724921866.

The spelling of 31876872 in words is "thirty-one million, eight hundred seventy-six thousand, eight hundred seventy-two".