189616818 has 8 divisors (see below), whose sum is σ = 379233648. Its totient is φ = 63205604.

The previous prime is 189616813. The next prime is 189616829. The reversal of 189616818 is 818616981.

189616818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

189616818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (189616811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15801396 + ... + 15801407.

It is an arithmetic number, because the mean of its divisors is an integer number (47404206).

Almost surely, 2^189616818 is an apocalyptic number.

189616818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

189616818 is a wasteful number, since it uses less digits than its factorization.

189616818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31602808.

The product of its digits is 165888, while the sum is 48.

The square root of 189616818 is about 13770.1422650603. The cubic root of 189616818 is about 574.5029786976.

The spelling of 189616818 in words is "one hundred eighty-nine million, six hundred sixteen thousand, eight hundred eighteen".