189323780 has 12 divisors (see below), whose sum is σ = 397579980. Its totient is φ = 75729504.

The previous prime is 189323777. The next prime is 189323801. The reversal of 189323780 is 87323981.

It can be written as a sum of positive squares in 2 ways, for example, as 43349056 + 145974724 = 6584^2 + 12082^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4733075 + ... + 4733114.

It is an arithmetic number, because the mean of its divisors is an integer number (33131665).

Almost surely, 2^189323780 is an apocalyptic number.

189323780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189323780 is an abundant number, since it is smaller than the sum of its proper divisors (208256200).

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

189323780 is a wasteful number, since it uses less digits than its factorization.

189323780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9466198 (or 9466196 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 189323780 is about 13759.4978106034. The cubic root of 189323780 is about 574.2068762655.

The spelling of 189323780 in words is "one hundred eighty-nine million, three hundred twenty-three thousand, seven hundred eighty".