189247220 has 96 divisors (see below), whose sum is σ = 445132800. Its totient is φ = 67250304.

The previous prime is 189247189. The next prime is 189247229. The reversal of 189247220 is 22742981.

189247220 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 3×189247220³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189247229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515477 + ... + 515843.

It is an arithmetic number, because the mean of its divisors is an integer number (4636800).

Almost surely, 2^189247220 is an apocalyptic number.

189247220 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 189247220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222566400).

189247220 is an abundant number, since it is smaller than the sum of its proper divisors (255885580).

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

189247220 is a wasteful number, since it uses less digits than its factorization.

189247220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 189247220 is about 13756.7154510079. The cubic root of 189247220 is about 574.1294653075.

The spelling of 189247220 in words is "one hundred eighty-nine million, two hundred forty-seven thousand, two hundred twenty".