904904 has 64 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 322560.

The previous prime is 904903. The next prime is 904907. The reversal of 904904 is 409409.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904901) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7952 + ... + 8064.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2⁹⁰⁴⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 904904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120).

904904 is an abundant number, since it is smaller than the sum of its proper divisors (1393336).

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

904904 is a wasteful number, since it uses less digits than its factorization.

904904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 904904 is about 951.2644217041. The cubic root of 904904 is about 96.7239823922.

It can be divided in two parts, 90 and 4904, that added together give a palindrome (4994).

The spelling of 904904 in words is "nine hundred four thousand, nine hundred four".