189213660 has 72 divisors (see below), whose sum is σ = 577558800. Its totient is φ = 50139648.

The previous prime is 189213659. The next prime is 189213667. The reversal of 189213660 is 66312981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189213667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26116 + ... + 32564.

It is an arithmetic number, because the mean of its divisors is an integer number (8021650).

Almost surely, 2^189213660 is an apocalyptic number.

189213660 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 189213660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288779400).

189213660 is an abundant number, since it is smaller than the sum of its proper divisors (388345140).

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

189213660 is a wasteful number, since it uses less digits than its factorization.

189213660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627 (or 6622 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 189213660 is about 13755.4956290204. The cubic root of 189213660 is about 574.0955257091.

The spelling of 189213660 in words is "one hundred eighty-nine million, two hundred thirteen thousand, six hundred sixty".