189020660 has 48 divisors (see below), whose sum is σ = 413622720. Its totient is φ = 72495360.

The previous prime is 189020659. The next prime is 189020717. The reversal of 189020660 is 66020981.

189020660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 46427 + ... + 50333.

It is an arithmetic number, because the mean of its divisors is an integer number (8617140).

Almost surely, 2^189020660 is an apocalyptic number.

189020660 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 189020660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206811360).

189020660 is an abundant number, since it is smaller than the sum of its proper divisors (224602060).

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

189020660 is a wasteful number, since it uses less digits than its factorization.

189020660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 189020660 is about 13748.4784612698. The cubic root of 189020660 is about 573.9002647356.

The spelling of 189020660 in words is "one hundred eighty-nine million, twenty thousand, six hundred sixty".