189386220 has 48 divisors (see below), whose sum is σ = 538207488. Its totient is φ = 49748160.

The previous prime is 189386207. The next prime is 189386227. The reversal of 189386220 is 22683981.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (189386227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19536 + ... + 27575.

It is an arithmetic number, because the mean of its divisors is an integer number (11212656).

Almost surely, 2^189386220 is an apocalyptic number.

189386220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189386220 is an abundant number, since it is smaller than the sum of its proper divisors (348821268).

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

189386220 is a wasteful number, since it uses less digits than its factorization.

189386220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47190 (or 47188 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 189386220 is about 13761.7666017122. The cubic root of 189386220 is about 574.2699948315.

The spelling of 189386220 in words is "one hundred eighty-nine million, three hundred eighty-six thousand, two hundred twenty".