289218 has 32 divisors (see below), whose sum is σ = 633600. Its totient is φ = 87696.

The previous prime is 289213. The next prime is 289241. The reversal of 289218 is 812982.

289218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2⁵ + 8⁴ + 2¹⁴ + 9⁴ + 1 + 8⁶ .

It is a zygodrome in base 5.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289218.

It is not an unprimeable number, because it can be changed into a prime (289213) 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, 4873 + ... + 4931.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2²⁸⁹²¹⁸ is an apocalyptic number.

289218 is an abundant number, since it is smaller than the sum of its proper divisors (344382).

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

289218 is a wasteful number, since it uses less digits than its factorization.

289218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126.

The product of its digits is 2304, while the sum is 30.

The square root of 289218 is about 537.7899218096. The cubic root of 289218 is about 66.1315100503.

The spelling of 289218 in words is "two hundred eighty-nine thousand, two hundred eighteen".