289365 has 16 divisors (see below), whose sum is σ = 470016. Its totient is φ = 152000.

The previous prime is 289361. The next prime is 289369. The reversal of 289365 is 563982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (289361) and next prime (289369).

It is not a de Polignac number, because 289365 - 2² = 289361 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289365.

It is not an unprimeable number, because it can be changed into a prime (289361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1420 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (29376).

2²⁸⁹³⁶⁵ is an apocalyptic number.

It is an amenable number.

289365 is a deficient number, since it is larger than the sum of its proper divisors (180651).

289365 is a wasteful number, since it uses less digits than its factorization.

289365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its digits is 12960, while the sum is 33.

The square root of 289365 is about 537.9265749152. The cubic root of 289365 is about 66.1427123099.

The spelling of 289365 in words is "two hundred eighty-nine thousand, three hundred sixty-five".