404904 has 16 divisors (see below), whose sum is σ = 1012320. Its totient is φ = 134960.

The previous prime is 404851. The next prime is 404941. The reversal of 404904 is 409404.

It is a happy number.

404904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

404904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8412 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (63270).

2⁴⁰⁴⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

404904 is an abundant number, since it is smaller than the sum of its proper divisors (607416).

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

404904 is a wasteful number, since it uses less digits than its factorization.

404904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16880 (or 16876 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 404904 is about 636.3206738744. The cubic root of 404904 is about 73.9805159319.

The spelling of 404904 in words is "four hundred four thousand, nine hundred four".