189219328 has 80 divisors (see below), whose sum is σ = 406581120. Its totient is φ = 87699456.

The previous prime is 189219311. The next prime is 189219337. The reversal of 189219328 is 823912981.

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, 515401 + ... + 515767.

It is an arithmetic number, because the mean of its divisors is an integer number (5082264).

Almost surely, 2^189219328 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 189219328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203290560).

189219328 is an abundant number, since it is smaller than the sum of its proper divisors (217361792).

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

189219328 is an equidigital number, since it uses as much as digits as its factorization.

189219328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 441 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 189219328 is about 13755.7016542232. The cubic root of 189219328 is about 574.1012581017.

The spelling of 189219328 in words is "one hundred eighty-nine million, two hundred nineteen thousand, three hundred twenty-eight".