218964 has 24 divisors (see below), whose sum is σ = 520128. Its totient is φ = 71680.

The previous prime is 218963. The next prime is 218969. The reversal of 218964 is 469812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (21672).

2²¹⁸⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

218964 is an abundant number, since it is smaller than the sum of its proper divisors (301164).

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

218964 is a wasteful number, since it uses less digits than its factorization.

218964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 333 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 218964 is about 467.9358930452. The cubic root of 218964 is about 60.2731985985.

The spelling of 218964 in words is "two hundred eighteen thousand, nine hundred sixty-four".