204404 has 12 divisors (see below), whose sum is σ = 361284. Its totient is φ = 101184.

The previous prime is 204397. The next prime is 204427. The reversal of 204404 is 404402.

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 88804 = 340^2 + 298^2 .

It is a congruent number.

It is an unprimeable number.

204404 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 3 ways as a sum of consecutive naturals, for example, 362 + ... + 734.

It is an arithmetic number, because the mean of its divisors is an integer number (30107).

2²⁰⁴⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

204404 is a deficient number, since it is larger than the sum of its proper divisors (156880).

204404 is a wasteful number, since it uses less digits than its factorization.

204404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204404 is about 452.1106059362. The cubic root of 204404 is about 58.9064878903.

Adding to 204404 its reverse (404402), we get a palindrome (608806).

The spelling of 204404 in words is "two hundred four thousand, four hundred four", and thus it is an iban number.