389963864 has 16 divisors (see below), whose sum is σ = 734896800. Its totient is φ = 193991392.

The previous prime is 389963857. The next prime is 389963869. The reversal of 389963864 is 468369983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389963869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122144 + ... + 125295.

It is an arithmetic number, because the mean of its divisors is an integer number (45931050).

Almost surely, 2^389963864 is an apocalyptic number.

It is an amenable number.

389963864 is a deficient number, since it is larger than the sum of its proper divisors (344932936).

389963864 is a wasteful number, since it uses less digits than its factorization.

389963864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247642 (or 247638 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 56.

The square root of 389963864 is about 19747.5027281933. The cubic root of 389963864 is about 730.5917913414.

The spelling of 389963864 in words is "three hundred eighty-nine million, nine hundred sixty-three thousand, eight hundred sixty-four".