289220 has 12 divisors (see below), whose sum is σ = 607404. Its totient is φ = 115680.

The previous prime is 289213. The next prime is 289241. The reversal of 289220 is 22982.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 238144 = 226^2 + 488^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289220.

It is an unprimeable number.

289220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7211 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (50617).

2²⁸⁹²²⁰ is an apocalyptic number.

289220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289220 is an abundant number, since it is smaller than the sum of its proper divisors (318184).

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

289220 is a wasteful number, since it uses less digits than its factorization.

289220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14470 (or 14468 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 289220 is about 537.7917812686. The cubic root of 289220 is about 66.1316624874.

The spelling of 289220 in words is "two hundred eighty-nine thousand, two hundred twenty".