189660 has 48 divisors (see below), whose sum is σ = 554400. Its totient is φ = 48384.

The previous prime is 189653. The next prime is 189661. The reversal of 189660 is 66981.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189661) by changing a digit.

189660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686 + ... + 1794.

It is an arithmetic number, because the mean of its divisors is an integer number (11550).

2¹⁸⁹⁶⁶⁰ is an apocalyptic number.

189660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 435×436.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277200).

189660 is an abundant number, since it is smaller than the sum of its proper divisors (364740).

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

189660 is a wasteful number, since it uses less digits than its factorization.

189660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 189660 is about 435.4997129735. The cubic root of 189660 is about 57.4546586476.

The spelling of 189660 in words is "one hundred eighty-nine thousand, six hundred sixty".