189188 has 6 divisors (see below), whose sum is σ = 331086. Its totient is φ = 94592.

The previous prime is 189187. The next prime is 189199. The reversal of 189188 is 881981.

It can be written as a sum of positive squares in only one way, i.e., 145924 + 43264 = 382^2 + 208^2 .

It is not an unprimeable number, because it can be changed into a prime (189187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23645 + ... + 23652.

It is an arithmetic number, because the mean of its divisors is an integer number (55181).

2¹⁸⁹¹⁸⁸ is an apocalyptic number.

It is an amenable number.

189188 is a deficient number, since it is larger than the sum of its proper divisors (141898).

189188 is a wasteful number, since it uses less digits than its factorization.

189188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47301 (or 47299 counting only the distinct ones).

The product of its digits is 4608, while the sum is 35.

The square root of 189188 is about 434.9574691852. The cubic root of 189188 is about 57.4069572761.

The spelling of 189188 in words is "one hundred eighty-nine thousand, one hundred eighty-eight".