31668032 has 28 divisors (see below), whose sum is σ = 68555616. Its totient is φ = 14394240.

The previous prime is 31668017. The next prime is 31668047. The reversal of 31668032 is 23086613.

It is an interprime number because it is at equal distance from previous prime (31668017) and next prime (31668047).

It is a junction number, because it is equal to n+sod(n) for n = 31667986 and 31668004.

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, 21788 + ... + 23195.

Almost surely, 2^31668032 is an apocalyptic number.

31668032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31668032 is an abundant number, since it is smaller than the sum of its proper divisors (36887584).

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

31668032 is a wasteful number, since it uses less digits than its factorization.

31668032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45006 (or 44996 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 31668032 is about 5627.4356504539. The cubic root of 31668032 is about 316.3785454405.

The spelling of 31668032 in words is "thirty-one million, six hundred sixty-eight thousand, thirty-two".