189038220 has 96 divisors (see below), whose sum is σ = 636787200. Its totient is φ = 40932864.

The previous prime is 189038209. The next prime is 189038233. The reversal of 189038220 is 22830981.

189038220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3865 + ... + 19824.

It is an arithmetic number, because the mean of its divisors is an integer number (6633200).

Almost surely, 2^189038220 is an apocalyptic number.

189038220 is a gapful number since it is divisible by the number (10) 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 189038220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318393600).

189038220 is an abundant number, since it is smaller than the sum of its proper divisors (447748980).

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

189038220 is a wasteful number, since it uses less digits than its factorization.

189038220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23727 (or 23725 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 189038220 is about 13749.1170625608. The cubic root of 189038220 is about 573.9180359439.

The spelling of 189038220 in words is "one hundred eighty-nine million, thirty-eight thousand, two hundred twenty".