204578 has 16 divisors (see below), whose sum is σ = 355104. Its totient is φ = 87360.

The previous prime is 204563. The next prime is 204583. The reversal of 204578 is 875402.

204578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 647.

It is an arithmetic number, because the mean of its divisors is an integer number (22194).

2²⁰⁴⁵⁷⁸ is an apocalyptic number.

204578 is a deficient number, since it is larger than the sum of its proper divisors (150526).

204578 is a wasteful number, since it uses less digits than its factorization.

204578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 204578 is about 452.3029957893. The cubic root of 204578 is about 58.9231979708.

The spelling of 204578 in words is "two hundred four thousand, five hundred seventy-eight".