904422 has 16 divisors (see below), whose sum is σ = 1818432. Its totient is φ = 299880.

The previous prime is 904399. The next prime is 904441. The reversal of 904422 is 224409.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

904422 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 7 ways as a sum of consecutive naturals, for example, 1597 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (113652).

2⁹⁰⁴⁴²² is an apocalyptic number.

904422 is an abundant number, since it is smaller than the sum of its proper divisors (914010).

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

904422 is a wasteful number, since it uses less digits than its factorization.

904422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

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

The square root of 904422 is about 951.0110409454. The cubic root of 904422 is about 96.7068058963.

Subtracting from 904422 its sum of digits (21), we obtain a square (904401 = 951²).

It can be divided in two parts, 904 and 422, that added together give a triangular number (1326 = T₅₁).

The spelling of 904422 in words is "nine hundred four thousand, four hundred twenty-two".