31641968 has 10 divisors (see below), whose sum is σ = 61306344. Its totient is φ = 15820976.

The previous prime is 31641959. The next prime is 31641971. The reversal of 31641968 is 86914613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988796 + ... + 988827.

Almost surely, 2^31641968 is an apocalyptic number.

It is an amenable number.

31641968 is a deficient number, since it is larger than the sum of its proper divisors (29664376).

31641968 is a wasteful number, since it uses less digits than its factorization.

31641968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977631 (or 1977625 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 31641968 is about 5625.1193765110. The cubic root of 31641968 is about 316.2917244078.

The spelling of 31641968 in words is "thirty-one million, six hundred forty-one thousand, nine hundred sixty-eight".