920904 has 16 divisors (see below), whose sum is σ = 2302320. Its totient is φ = 306960.

The previous prime is 920891. The next prime is 920921. The reversal of 920904 is 409029.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 38371 = 920904 / (9 + 2 + 0 + 9 + 0 + 4).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19162 + ... + 19209.

It is an arithmetic number, because the mean of its divisors is an integer number (143895).

2⁹²⁰⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

920904 is an abundant number, since it is smaller than the sum of its proper divisors (1381416).

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

920904 is a wasteful number, since it uses less digits than its factorization.

920904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38380 (or 38376 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 920904 is about 959.6374315334. The cubic root of 920904 is about 97.2907280016.

The spelling of 920904 in words is "nine hundred twenty thousand, nine hundred four".