189186980 has 24 divisors (see below), whose sum is σ = 399317688. Its totient is φ = 75289088.

The previous prime is 189186979. The next prime is 189186989. The reversal of 189186980 is 89681981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37552384 + 151634596 = 6128^2 + 12314^2 .

It is not an unprimeable number, because it can be changed into a prime (189186989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20069 + ... + 27948.

It is an arithmetic number, because the mean of its divisors is an integer number (16638237).

Almost surely, 2^189186980 is an apocalyptic number.

189186980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189186980 is an abundant number, since it is smaller than the sum of its proper divisors (210130708).

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

189186980 is a wasteful number, since it uses less digits than its factorization.

189186980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48223 (or 48221 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 189186980 is about 13754.5258006229. The cubic root of 189186980 is about 574.0685410672.

The spelling of 189186980 in words is "one hundred eighty-nine million, one hundred eighty-six thousand, nine hundred eighty".