31976428 has 18 divisors (see below), whose sum is σ = 61509308. Its totient is φ = 14534520.

The previous prime is 31976423. The next prime is 31976429. The reversal of 31976428 is 82467913.

It is not an unprimeable number, because it can be changed into a prime (31976423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32550 + ... + 33517.

Almost surely, 2^31976428 is an apocalyptic number.

It is an amenable number.

31976428 is a deficient number, since it is larger than the sum of its proper divisors (29532880).

31976428 is a wasteful number, since it uses less digits than its factorization.

31976428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66093 (or 66080 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 31976428 is about 5654.7703755325. The cubic root of 31976428 is about 317.4022366247.

The spelling of 31976428 in words is "thirty-one million, nine hundred seventy-six thousand, four hundred twenty-eight".