205856604 has 72 divisors (see below), whose sum is σ = 565922448. Its totient is φ = 62830080.

The previous prime is 205856597. The next prime is 205856627. The reversal of 205856604 is 406658502.

205856604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18099 + ... + 27189.

It is an arithmetic number, because the mean of its divisors is an integer number (7860034).

Almost surely, 2^205856604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205856604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282961224).

205856604 is an abundant number, since it is smaller than the sum of its proper divisors (360065844).

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

205856604 is a wasteful number, since it uses less digits than its factorization.

205856604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155 (or 9150 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 205856604 is about 14347.7037884116. The cubic root of 205856604 is about 590.4569896185.

The spelling of 205856604 in words is "two hundred five million, eight hundred fifty-six thousand, six hundred four".