389915644 has 48 divisors (see below), whose sum is σ = 745113600. Its totient is φ = 177854400.

The previous prime is 389915633. The next prime is 389915671. The reversal of 389915644 is 446519983.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845574 + ... + 846034.

It is an arithmetic number, because the mean of its divisors is an integer number (15523200).

Almost surely, 2^389915644 is an apocalyptic number.

It is an amenable number.

389915644 is a deficient number, since it is larger than the sum of its proper divisors (355197956).

389915644 is a wasteful number, since it uses less digits than its factorization.

389915644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 389915644 is about 19746.2817765776. The cubic root of 389915644 is about 730.5616769372.

The spelling of 389915644 in words is "three hundred eighty-nine million, nine hundred fifteen thousand, six hundred forty-four".