189388568 has 32 divisors (see below), whose sum is σ = 384004800. Its totient is φ = 87224832.

The previous prime is 189388513. The next prime is 189388603. The reversal of 189388568 is 865883981.

189388568 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 7 ways as a sum of consecutive naturals, for example, 8423 + ... + 21206.

It is an arithmetic number, because the mean of its divisors is an integer number (12000150).

Almost surely, 2^189388568 is an apocalyptic number.

It is an amenable number.

189388568 is an abundant number, since it is smaller than the sum of its proper divisors (194616232).

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

189388568 is a wasteful number, since it uses less digits than its factorization.

189388568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29699 (or 29695 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 56.

The square root of 189388568 is about 13761.8519102627. The cubic root of 189388568 is about 574.2723680777.

The spelling of 189388568 in words is "one hundred eighty-nine million, three hundred eighty-eight thousand, five hundred sixty-eight".