389665808 has 40 divisors (see below), whose sum is σ = 892591680. Its totient is φ = 161239680.

The previous prime is 389665741. The next prime is 389665811. The reversal of 389665808 is 808566983.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 389665808.

It is an unprimeable number.

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, 56738 + ... + 63233.

It is an arithmetic number, because the mean of its divisors is an integer number (22314792).

Almost surely, 2^389665808 is an apocalyptic number.

It is an amenable number.

389665808 is an abundant number, since it is smaller than the sum of its proper divisors (502925872).

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

389665808 is a wasteful number, since it uses less digits than its factorization.

389665808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120015 (or 120009 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 389665808 is about 19739.9546098769. The cubic root of 389665808 is about 730.4056093306.

The spelling of 389665808 in words is "three hundred eighty-nine million, six hundred sixty-five thousand, eight hundred eight".