904420 has 24 divisors (see below), whose sum is σ = 2072448. Its totient is φ = 328800.

The previous prime is 904399. The next prime is 904441. The reversal of 904420 is 24409.

904420 = T₄₀₀ + T₄₀₁ + ... + T₄₁₀.

It is an interprime number because it is at equal distance from previous prime (904399) and next prime (904441).

It is an Ulam number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 1836 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (86352).

2⁹⁰⁴⁴²⁰ is an apocalyptic number.

It is an amenable number.

904420 is an abundant number, since it is smaller than the sum of its proper divisors (1168028).

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

904420 is a wasteful number, since it uses less digits than its factorization.

904420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 904420 is about 951.0099894323. The cubic root of 904420 is about 96.7067346118.

Subtracting from 904420 its sum of digits (19), we obtain a square (904401 = 951²).

Adding to 904420 its reverse (24409), we get a palindrome (928829).

The spelling of 904420 in words is "nine hundred four thousand, four hundred twenty".