189640684 has 12 divisors (see below), whose sum is σ = 332858344. Its totient is φ = 94538304.

The previous prime is 189640679. The next prime is 189640687. The reversal of 189640684 is 486046981.

It is not an unprimeable number, because it can be changed into a prime (189640687) 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, 68994 + ... + 71689.

Almost surely, 2^189640684 is an apocalyptic number.

It is an amenable number.

189640684 is a deficient number, since it is larger than the sum of its proper divisors (143217660).

189640684 is a wasteful number, since it uses less digits than its factorization.

189640684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141024 (or 141022 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 189640684 is about 13771.0088228859. The cubic root of 189640684 is about 574.5270808369.

The spelling of 189640684 in words is "one hundred eighty-nine million, six hundred forty thousand, six hundred eighty-four".