189864966 has 16 divisors (see below), whose sum is σ = 384537600. Its totient is φ = 62487048.

The previous prime is 189864953. The next prime is 189864971. The reversal of 189864966 is 669468981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199806 + ... + 200753.

It is an arithmetic number, because the mean of its divisors is an integer number (24033600).

Almost surely, 2^189864966 is an apocalyptic number.

189864966 is an abundant number, since it is smaller than the sum of its proper divisors (194672634).

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

189864966 is a wasteful number, since it uses less digits than its factorization.

189864966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400643.

The product of its digits is 4478976, while the sum is 57.

The square root of 189864966 is about 13779.1496834892. The cubic root of 189864966 is about 574.7534832371.

The spelling of 189864966 in words is "one hundred eighty-nine million, eight hundred sixty-four thousand, nine hundred sixty-six".