205953864 has 16 divisors (see below), whose sum is σ = 514884720. Its totient is φ = 68651280.

The previous prime is 205953829. The next prime is 205953887. The reversal of 205953864 is 468359502.

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, 4290682 + ... + 4290729.

It is an arithmetic number, because the mean of its divisors is an integer number (32180295).

Almost surely, 2^205953864 is an apocalyptic number.

205953864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

205953864 is an abundant number, since it is smaller than the sum of its proper divisors (308930856).

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

205953864 is a wasteful number, since it uses less digits than its factorization.

205953864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8581420 (or 8581416 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 205953864 is about 14351.0927806910. The cubic root of 205953864 is about 590.5499650261.

The spelling of 205953864 in words is "two hundred five million, nine hundred fifty-three thousand, eight hundred sixty-four".