904428 has 72 divisors (see below), whose sum is σ = 2711072. Its totient is φ = 248832.

The previous prime is 904399. The next prime is 904441. The reversal of 904428 is 824409.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9276 + ... + 9372.

2⁹⁰⁴⁴²⁸ 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 904428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355536).

904428 is an abundant number, since it is smaller than the sum of its proper divisors (1806644).

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

904428 is a wasteful number, since it uses less digits than its factorization.

904428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 904428 is about 951.0141954776. The cubic root of 904428 is about 96.7070197491.

Subtracting from 904428 its sum of digits (27), we obtain a square (904401 = 951²).

The spelling of 904428 in words is "nine hundred four thousand, four hundred twenty-eight".