189111168 has 96 divisors (see below), whose sum is σ = 548566200. Its totient is φ = 62530560.

The previous prime is 189111121. The next prime is 189111187. The reversal of 189111168 is 861111981.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159538 + ... + 160718.

Almost surely, 2^189111168 is an apocalyptic number.

189111168 is a gapful number since it is divisible by the number (18) 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 189111168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274283100).

189111168 is an abundant number, since it is smaller than the sum of its proper divisors (359455032).

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

189111168 is a wasteful number, since it uses less digits than its factorization.

189111168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1325 counting only the distinct ones).

The product of its digits is 3456, while the sum is 36.

The square root of 189111168 is about 13751.7696315783. The cubic root of 189111168 is about 573.9918495688.

The spelling of 189111168 in words is "one hundred eighty-nine million, one hundred eleven thousand, one hundred sixty-eight".