188289 has 6 divisors (see below), whose sum is σ = 271986. Its totient is φ = 125520.

The previous prime is 188281. The next prime is 188291. The reversal of 188289 is 982881.

It can be written as a sum of positive squares in only one way, i.e., 173889 + 14400 = 417^2 + 120^2 .

It is not a de Polignac number, because 188289 - 2³ = 188281 is a prime.

188289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (188281) 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, 10452 + ... + 10469.

It is an arithmetic number, because the mean of its divisors is an integer number (45331).

2¹⁸⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

188289 is a deficient number, since it is larger than the sum of its proper divisors (83697).

188289 is a wasteful number, since it uses less digits than its factorization.

188289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20927 (or 20924 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 188289 is about 433.9228041945. The cubic root of 188289 is about 57.3158824060.

The spelling of 188289 in words is "one hundred eighty-eight thousand, two hundred eighty-nine".