39904904 has 32 divisors (see below), whose sum is σ = 80944920. Its totient is φ = 18333696.

The previous prime is 39904871. The next prime is 39904913. The reversal of 39904904 is 40940993.

It can be written as a sum of positive squares in 4 ways, for example, as 39816100 + 88804 = 6310^2 + 298^2 .

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, 25982 + ... + 27474.

Almost surely, 2^39904904 is an apocalyptic number.

It is an amenable number.

39904904 is an abundant number, since it is smaller than the sum of its proper divisors (41040016).

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

39904904 is a wasteful number, since it uses less digits than its factorization.

39904904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 39904904 is about 6317.0328477854. The cubic root of 39904904 is about 341.7239544894.

The spelling of 39904904 in words is "thirty-nine million, nine hundred four thousand, nine hundred four".