189660984 has 32 divisors (see below), whose sum is σ = 474768000. Its totient is φ = 63138272.

The previous prime is 189660979. The next prime is 189661009. The reversal of 189660984 is 489066981.

It is a happy number.

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, 15427 + ... + 24845.

It is an arithmetic number, because the mean of its divisors is an integer number (14836500).

Almost surely, 2^189660984 is an apocalyptic number.

It is an amenable number.

189660984 is an abundant number, since it is smaller than the sum of its proper divisors (285107016).

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

189660984 is a wasteful number, since it uses less digits than its factorization.

189660984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267 (or 10263 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 189660984 is about 13771.7458588227. The cubic root of 189660984 is about 574.5475801014.

The spelling of 189660984 in words is "one hundred eighty-nine million, six hundred sixty thousand, nine hundred eighty-four".