189191328 has 24 divisors (see below), whose sum is σ = 496627488. Its totient is φ = 63063744.

The previous prime is 189191311. The next prime is 189191339. The reversal of 189191328 is 823191981.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 189191328.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985276 + ... + 985467.

It is an arithmetic number, because the mean of its divisors is an integer number (20692812).

Almost surely, 2^189191328 is an apocalyptic number.

It is an amenable number.

189191328 is an abundant number, since it is smaller than the sum of its proper divisors (307436160).

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

189191328 is a wasteful number, since it uses less digits than its factorization.

189191328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970756 (or 1970748 counting only the distinct ones).

The product of its digits is 31104, while the sum is 42.

The square root of 189191328 is about 13754.6838567813. The cubic root of 189191328 is about 574.0729388872.

The spelling of 189191328 in words is "one hundred eighty-nine million, one hundred ninety-one thousand, three hundred twenty-eight".