389386518 has 16 divisors (see below), whose sum is σ = 786802800. Its totient is φ = 128457216.

The previous prime is 389386511. The next prime is 389386531. The reversal of 389386518 is 815683983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389386511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333943 + ... + 335106.

It is an arithmetic number, because the mean of its divisors is an integer number (49175175).

Almost surely, 2^389386518 is an apocalyptic number.

389386518 is an abundant number, since it is smaller than the sum of its proper divisors (397416282).

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

389386518 is a wasteful number, since it uses less digits than its factorization.

389386518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669151.

The product of its digits is 1244160, while the sum is 51.

The square root of 389386518 is about 19732.8791107633. The cubic root of 389386518 is about 730.2310634033.

The spelling of 389386518 in words is "three hundred eighty-nine million, three hundred eighty-six thousand, five hundred eighteen".