389979888 has 20 divisors (see below), whose sum is σ = 1007448168. Its totient is φ = 129993280.

The previous prime is 389979869. The next prime is 389979917. The reversal of 389979888 is 888979983.

It is a congruent number.

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, 4062243 + ... + 4062338.

Almost surely, 2^389979888 is an apocalyptic number.

It is an amenable number.

389979888 is an abundant number, since it is smaller than the sum of its proper divisors (617468280).

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

389979888 is a wasteful number, since it uses less digits than its factorization.

389979888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124592 (or 8124586 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 69.

The square root of 389979888 is about 19747.9084462127. The cubic root of 389979888 is about 730.6017981169.

The spelling of 389979888 in words is "three hundred eighty-nine million, nine hundred seventy-nine thousand, eight hundred eighty-eight".