189290660 has 48 divisors (see below), whose sum is σ = 429240000. Its totient is φ = 69704064.

The previous prime is 189290657. The next prime is 189290663. The reversal of 189290660 is 66092981.

It is an interprime number because it is at equal distance from previous prime (189290657) and next prime (189290663).

It is not an unprimeable number, because it can be changed into a prime (189290663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129011 + ... + 130469.

It is an arithmetic number, because the mean of its divisors is an integer number (8942500).

Almost surely, 2^189290660 is an apocalyptic number.

189290660 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 189290660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214620000).

189290660 is an abundant number, since it is smaller than the sum of its proper divisors (239949340).

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

189290660 is a wasteful number, since it uses less digits than its factorization.

189290660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 189290660 is about 13758.2942256662. The cubic root of 189290660 is about 574.1733907012.

The spelling of 189290660 in words is "one hundred eighty-nine million, two hundred ninety thousand, six hundred sixty".