205634868 has 24 divisors (see below), whose sum is σ = 486389568. Its totient is φ = 67605696.

The previous prime is 205634861. The next prime is 205634959. The reversal of 205634868 is 868436502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205634861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116496 + ... + 118247.

It is an arithmetic number, because the mean of its divisors is an integer number (20266232).

Almost surely, 2^205634868 is an apocalyptic number.

It is an amenable number.

205634868 is an abundant number, since it is smaller than the sum of its proper divisors (280754700).

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

205634868 is a wasteful number, since it uses less digits than its factorization.

205634868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234823 (or 234821 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 205634868 is about 14339.9744769647. The cubic root of 205634868 is about 590.2449122064.

The spelling of 205634868 in words is "two hundred five million, six hundred thirty-four thousand, eight hundred sixty-eight".