189321216 has 208 divisors, whose sum is σ = 603906048. Its totient is φ = 51609600.

The previous prime is 189321203. The next prime is 189321241. The reversal of 189321216 is 612123981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666461 + ... + 2666531.

Almost surely, 2^189321216 is an apocalyptic number.

189321216 is a gapful number since it is divisible by the number (16) 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 189321216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301953024).

189321216 is an abundant number, since it is smaller than the sum of its proper divisors (414584832).

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

189321216 is an equidigital number, since it uses as much as digits as its factorization.

189321216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 114 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 189321216 is about 13759.4046382829. The cubic root of 189321216 is about 574.2042841046.

The spelling of 189321216 in words is "one hundred eighty-nine million, three hundred twenty-one thousand, two hundred sixteen".