189386688 has 112 divisors (see below), whose sum is σ = 529035264. Its totient is φ = 59704320.

The previous prime is 189386677. The next prime is 189386693. The reversal of 189386688 is 886683981.

189386688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279406 + ... + 280082.

Almost surely, 2^189386688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189386688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264517632).

189386688 is an abundant number, since it is smaller than the sum of its proper divisors (339648576).

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

189386688 is a wasteful number, since it uses less digits than its factorization.

189386688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 760 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 57.

The square root of 189386688 is about 13761.7836053326. The cubic root of 189386688 is about 574.2704678651.

The spelling of 189386688 in words is "one hundred eighty-nine million, three hundred eighty-six thousand, six hundred eighty-eight".