188905664 has 28 divisors (see below), whose sum is σ = 376787664. Its totient is φ = 93967104.

The previous prime is 188905663. The next prime is 188905711. The reversal of 188905664 is 466509881.

It is not an unprimeable number, because it can be changed into a prime (188905663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5117 + ... + 20099.

Almost surely, 2^188905664 is an apocalyptic number.

It is an amenable number.

188905664 is a deficient number, since it is larger than the sum of its proper divisors (187882000).

188905664 is a wasteful number, since it uses less digits than its factorization.

188905664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192 (or 15182 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 188905664 is about 13744.2956894851. The cubic root of 188905664 is about 573.7838583722.

The spelling of 188905664 in words is "one hundred eighty-eight million, nine hundred five thousand, six hundred sixty-four".