189131664 has 40 divisors (see below), whose sum is σ = 517332960. Its totient is φ = 59335168.

The previous prime is 189131653. The next prime is 189131669. The reversal of 189131664 is 466131981.

189131664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189131669) 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, 115074 + ... + 116705.

It is an arithmetic number, because the mean of its divisors is an integer number (12933324).

Almost surely, 2^189131664 is an apocalyptic number.

It is an amenable number.

189131664 is an abundant number, since it is smaller than the sum of its proper divisors (328201296).

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

189131664 is a wasteful number, since it uses less digits than its factorization.

189131664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231807 (or 231801 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 189131664 is about 13752.5148245694. The cubic root of 189131664 is about 574.0125853651.

The spelling of 189131664 in words is "one hundred eighty-nine million, one hundred thirty-one thousand, six hundred sixty-four".