204804 has 18 divisors (see below), whose sum is σ = 517790. Its totient is φ = 68256.

The previous prime is 204803. The next prime is 204821. The reversal of 204804 is 408402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 202500 + 2304 = 450^2 + 48^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (204803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2809 + ... + 2880.

2²⁰⁴⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

204804 is an abundant number, since it is smaller than the sum of its proper divisors (312986).

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

204804 is a wasteful number, since it uses less digits than its factorization.

204804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699 (or 5694 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204804 is about 452.5527593552. The cubic root of 204804 is about 58.9448877290.

The spelling of 204804 in words is "two hundred four thousand, eight hundred four".