37991968 has 24 divisors (see below), whose sum is σ = 85482432. Its totient is φ = 16282176.

The previous prime is 37991951. The next prime is 37991971. The reversal of 37991968 is 86919973.

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, 84580 + ... + 85027.

It is an arithmetic number, because the mean of its divisors is an integer number (3561768).

Almost surely, 2^37991968 is an apocalyptic number.

It is an amenable number.

37991968 is an abundant number, since it is smaller than the sum of its proper divisors (47490464).

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

37991968 is a wasteful number, since it uses less digits than its factorization.

37991968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169624 (or 169616 counting only the distinct ones).

The product of its digits is 734832, while the sum is 52.

The square root of 37991968 is about 6163.7624873124. The cubic root of 37991968 is about 336.1738518297.

The spelling of 37991968 in words is "thirty-seven million, nine hundred ninety-one thousand, nine hundred sixty-eight".