388805866 has 8 divisors (see below), whose sum is σ = 584890560. Its totient is φ = 193842348.

The previous prime is 388805831. The next prime is 388805881. The reversal of 388805866 is 668508883.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 279426 + ... + 280813.

It is an arithmetic number, because the mean of its divisors is an integer number (73111320).

Almost surely, 2^388805866 is an apocalyptic number.

388805866 is a deficient number, since it is larger than the sum of its proper divisors (196084694).

388805866 is a wasteful number, since it uses less digits than its factorization.

388805866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560588.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The square root of 388805866 is about 19718.1608168713. The cubic root of 388805866 is about 729.8679100467.

The spelling of 388805866 in words is "three hundred eighty-eight million, eight hundred five thousand, eight hundred sixty-six".