904404 has 12 divisors (see below), whose sum is σ = 2110304. Its totient is φ = 301464.

The previous prime is 904399. The next prime is 904441. The reversal of 904404 is 404409.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

904404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37672 + ... + 37695.

2⁹⁰⁴⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

904404 is an abundant number, since it is smaller than the sum of its proper divisors (1205900).

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

904404 is a wasteful number, since it uses less digits than its factorization.

904404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75374 (or 75372 counting only the distinct ones).

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

The square root of 904404 is about 951.0015772858. The cubic root of 904404 is about 96.7061643322.

The spelling of 904404 in words is "nine hundred four thousand, four hundred four".