389189172 has 24 divisors (see below), whose sum is σ = 909720000. Its totient is φ = 129499456.

The previous prime is 389189167. The next prime is 389189191. The reversal of 389189172 is 271981983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21672 + ... + 35327.

It is an arithmetic number, because the mean of its divisors is an integer number (37905000).

Almost surely, 2^389189172 is an apocalyptic number.

It is an amenable number.

389189172 is an abundant number, since it is smaller than the sum of its proper divisors (520530828).

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

389189172 is a wasteful number, since it uses less digits than its factorization.

389189172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57575 (or 57573 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 389189172 is about 19727.8780409856. The cubic root of 389189172 is about 730.1076791181.

The spelling of 389189172 in words is "three hundred eighty-nine million, one hundred eighty-nine thousand, one hundred seventy-two".