38405904 has 20 divisors (see below), whose sum is σ = 99215376. Its totient is φ = 12801952.

The previous prime is 38405893. The next prime is 38405911. The reversal of 38405904 is 40950483.

38405904 is a modest number, since divided by 5904 gives 384 as remainder.

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, 400014 + ... + 400109.

Almost surely, 2^38405904 is an apocalyptic number.

It is an amenable number.

38405904 is an abundant number, since it is smaller than the sum of its proper divisors (60809472).

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

38405904 is a wasteful number, since it uses less digits than its factorization.

38405904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800134 (or 800128 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 38405904 is about 6197.2497125741. The cubic root of 38405904 is about 337.3903556043.

The spelling of 38405904 in words is "thirty-eight million, four hundred five thousand, nine hundred four".