189236220 has 48 divisors (see below), whose sum is σ = 533395968. Its totient is φ = 50126400.

The previous prime is 189236209. The next prime is 189236237. The reversal of 189236220 is 22632981.

It is a happy number.

189236220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×189236220³ (a number of 26 digits) contains 333 as substring.

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, 1384 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (11112416).

Almost surely, 2^189236220 is an apocalyptic number.

189236220 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 189236220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266697984).

189236220 is an abundant number, since it is smaller than the sum of its proper divisors (344159748).

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

189236220 is a wasteful number, since it uses less digits than its factorization.

189236220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050 (or 21048 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 189236220 is about 13756.3156404613. The cubic root of 189236220 is about 574.1183413282.

The spelling of 189236220 in words is "one hundred eighty-nine million, two hundred thirty-six thousand, two hundred twenty".