204657872 has 20 divisors (see below), whose sum is σ = 410198820. Its totient is φ = 98800128.

The previous prime is 204657847. The next prime is 204657919. The reversal of 204657872 is 278756402.

204657872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47004736 + 157653136 = 6856^2 + 12556^2 .

It is a congruent number.

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, 220073 + ... + 221000.

It is an arithmetic number, because the mean of its divisors is an integer number (20509941).

Almost surely, 2^204657872 is an apocalyptic number.

It is an amenable number.

204657872 is an abundant number, since it is smaller than the sum of its proper divisors (205540948).

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

204657872 is a wasteful number, since it uses less digits than its factorization.

204657872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441110 (or 441104 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 204657872 is about 14305.8684462007. The cubic root of 204657872 is about 589.3086530117.

The spelling of 204657872 in words is "two hundred four million, six hundred fifty-seven thousand, eight hundred seventy-two".