404381904 has 20 divisors (see below), whose sum is σ = 1044653376. Its totient is φ = 134793952.

The previous prime is 404381863. The next prime is 404381927. The reversal of 404381904 is 409183404.

It is a happy number.

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, 4212264 + ... + 4212359.

Almost surely, 2^404381904 is an apocalyptic number.

It is an amenable number.

404381904 is an abundant number, since it is smaller than the sum of its proper divisors (640271472).

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

404381904 is a wasteful number, since it uses less digits than its factorization.

404381904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424634 (or 8424628 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 404381904 is about 20109.2492152243. The cubic root of 404381904 is about 739.4870465094.

The spelling of 404381904 in words is "four hundred four million, three hundred eighty-one thousand, nine hundred four".