188089664 has 84 divisors (see below), whose sum is σ = 450579744. Its totient is φ = 76301568.

The previous prime is 188089661. The next prime is 188089687. The reversal of 188089664 is 466980881.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188089661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161147 + ... + 162309.

Almost surely, 2^188089664 is an apocalyptic number.

188089664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188089664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225289872).

188089664 is an abundant number, since it is smaller than the sum of its proper divisors (262490080).

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

188089664 is a wasteful number, since it uses less digits than its factorization.

188089664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 188089664 is about 13714.5785206837. The cubic root of 188089664 is about 572.9564905383.

The spelling of 188089664 in words is "one hundred eighty-eight million, eighty-nine thousand, six hundred sixty-four".