189664984 has 16 divisors (see below), whose sum is σ = 355914720. Its totient is φ = 94754400.

The previous prime is 189664967. The next prime is 189664987. The reversal of 189664984 is 489466981.

189664984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189664987) 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, 1297 + ... + 19519.

It is an arithmetic number, because the mean of its divisors is an integer number (22244670).

Almost surely, 2^189664984 is an apocalyptic number.

It is an amenable number.

189664984 is a deficient number, since it is larger than the sum of its proper divisors (166249736).

189664984 is a wasteful number, since it uses less digits than its factorization.

189664984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19530 (or 19526 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 189664984 is about 13771.8910829268. The cubic root of 189664984 is about 574.5516191929.

The spelling of 189664984 in words is "one hundred eighty-nine million, six hundred sixty-four thousand, nine hundred eighty-four".