389163828 has 12 divisors (see below), whose sum is σ = 908048960. Its totient is φ = 129721272.

The previous prime is 389163821. The next prime is 389163829. The reversal of 389163828 is 828361983.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×389163828² = 302896970047227168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389163821) 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, 16215148 + ... + 16215171.

Almost surely, 2^389163828 is an apocalyptic number.

It is an amenable number.

389163828 is an abundant number, since it is smaller than the sum of its proper divisors (518885132).

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

389163828 is a wasteful number, since it uses less digits than its factorization.

389163828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32430326 (or 32430324 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 389163828 is about 19727.2356907905. The cubic root of 389163828 is about 730.0918305694.

The spelling of 389163828 in words is "three hundred eighty-nine million, one hundred sixty-three thousand, eight hundred twenty-eight".