204689856 has 84 divisors (see below), whose sum is σ = 630024648. Its totient is φ = 58480128.

The previous prime is 204689833. The next prime is 204689861. The reversal of 204689856 is 658986402.

It is a happy number.

204689856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1471 + ... + 20286.

Almost surely, 2^204689856 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 204689856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315012324).

204689856 is an abundant number, since it is smaller than the sum of its proper divisors (425334792).

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

204689856 is a wasteful number, since it uses less digits than its factorization.

204689856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21786 (or 21769 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 204689856 is about 14306.9862654579. The cubic root of 204689856 is about 589.3393505297.

The spelling of 204689856 in words is "two hundred four million, six hundred eighty-nine thousand, eight hundred fifty-six".