205857868 has 6 divisors (see below), whose sum is σ = 360251276. Its totient is φ = 102928932.

The previous prime is 205857857. The next prime is 205857877. The reversal of 205857868 is 868758502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25732230 + ... + 25732237.

Almost surely, 2^205857868 is an apocalyptic number.

It is an amenable number.

205857868 is a deficient number, since it is larger than the sum of its proper divisors (154393408).

205857868 is a wasteful number, since it uses less digits than its factorization.

205857868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51464471 (or 51464469 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The square root of 205857868 is about 14347.7478372043. The cubic root of 205857868 is about 590.4581981234.

The spelling of 205857868 in words is "two hundred five million, eight hundred fifty-seven thousand, eight hundred sixty-eight".