31872488 has 8 divisors (see below), whose sum is σ = 59760930. Its totient is φ = 15936240.

The previous prime is 31872473. The next prime is 31872497. The reversal of 31872488 is 88427813.

It can be written as a sum of positive squares in only one way, i.e., 28494244 + 3378244 = 5338^2 + 1838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992023 + ... + 1992038.

Almost surely, 2^31872488 is an apocalyptic number.

It is an amenable number.

31872488 is a deficient number, since it is larger than the sum of its proper divisors (27888442).

31872488 is a wasteful number, since it uses less digits than its factorization.

31872488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984067 (or 3984063 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 31872488 is about 5645.5724244757. The cubic root of 31872488 is about 317.0579559471.

The spelling of 31872488 in words is "thirty-one million, eight hundred seventy-two thousand, four hundred eighty-eight".