39913864 has 32 divisors (see below), whose sum is σ = 77702400. Its totient is φ = 19200960.

The previous prime is 39913859. The next prime is 39913871. The reversal of 39913864 is 46831993.

It is a self number, because there is not a number n which added to its sum of digits gives 39913864.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55942 + ... + 56650.

It is an arithmetic number, because the mean of its divisors is an integer number (2428200).

Almost surely, 2^39913864 is an apocalyptic number.

It is an amenable number.

39913864 is a deficient number, since it is larger than the sum of its proper divisors (37788536).

39913864 is a wasteful number, since it uses less digits than its factorization.

39913864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 969 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 39913864 is about 6317.7420016965. The cubic root of 39913864 is about 341.7495287688.

The spelling of 39913864 in words is "thirty-nine million, nine hundred thirteen thousand, eight hundred sixty-four".