189935568 has 30 divisors (see below), whose sum is σ = 531556194. Its totient is φ = 63311808.

The previous prime is 189935549. The next prime is 189935591. The reversal of 189935568 is 865539981.

It is a happy number.

189935568 is a `hidden beast` number, since 1 + 89 + 9 + 3 + 556 + 8 = 666.

189935568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 153066384 + 36869184 = 12372^2 + 6072^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 659355 + ... + 659642.

Almost surely, 2^189935568 is an apocalyptic number.

189935568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189935568 is an abundant number, since it is smaller than the sum of its proper divisors (341620626).

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

189935568 is a wasteful number, since it uses less digits than its factorization.

189935568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319011 (or 1319002 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 189935568 is about 13781.7113596244. The cubic root of 189935568 is about 574.8247158216.

The spelling of 189935568 in words is "one hundred eighty-nine million, nine hundred thirty-five thousand, five hundred sixty-eight".