189918608 has 40 divisors (see below), whose sum is σ = 406286496. Its totient is φ = 85280000.

The previous prime is 189918583. The next prime is 189918637. The reversal of 189918608 is 806819981.

It is a happy number.

189918608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 8108 + ... + 21108.

Almost surely, 2^189918608 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 189918608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203143248).

189918608 is an abundant number, since it is smaller than the sum of its proper divisors (216367888).

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

189918608 is a wasteful number, since it uses less digits than its factorization.

189918608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13103 (or 13097 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 189918608 is about 13781.0960376887. The cubic root of 189918608 is about 574.8076059538.

The spelling of 189918608 in words is "one hundred eighty-nine million, nine hundred eighteen thousand, six hundred eight".