180189 has 6 divisors (see below), whose sum is σ = 260286. Its totient is φ = 120120.

The previous prime is 180181. The next prime is 180211. The reversal of 180189 is 981081.

180189 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 108900 + 71289 = 330^2 + 267^2 .

It is not a de Polignac number, because 180189 - 2³ = 180181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10002 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (43381).

2¹⁸⁰¹⁸⁹ is an apocalyptic number.

It is an amenable number.

180189 is a deficient number, since it is larger than the sum of its proper divisors (80097).

180189 is a wasteful number, since it uses less digits than its factorization.

180189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20027 (or 20024 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 180189 is about 424.4867489098. The cubic root of 180189 is about 56.4819165769.

The spelling of 180189 in words is "one hundred eighty thousand, one hundred eighty-nine".