189786216 has 64 divisors (see below), whose sum is σ = 499115520. Its totient is φ = 60053760.

The previous prime is 189786199. The next prime is 189786227. The reversal of 189786216 is 612687981.

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, 37026 + ... + 41838.

It is an arithmetic number, because the mean of its divisors is an integer number (7798680).

Almost surely, 2^189786216 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 189786216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249557760).

189786216 is an abundant number, since it is smaller than the sum of its proper divisors (309329304).

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

189786216 is a wasteful number, since it uses less digits than its factorization.

189786216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906 (or 4902 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 189786216 is about 13776.2918087561. The cubic root of 189786216 is about 574.6740090422.

The spelling of 189786216 in words is "one hundred eighty-nine million, seven hundred eighty-six thousand, two hundred sixteen".