218670 has 32 divisors (see below), whose sum is σ = 541728. Its totient is φ = 56448.

The previous prime is 218657. The next prime is 218677. The reversal of 218670 is 76812.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 218670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218677) 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, 1012 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (16929).

2²¹⁸⁶⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270864).

218670 is an abundant number, since it is smaller than the sum of its proper divisors (323058).

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

218670 is a wasteful number, since it uses less digits than its factorization.

218670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 218670 is about 467.6216419286. The cubic root of 218670 is about 60.2462105133.

It can be divided in two parts, 218 and 670, that added together give a palindrome (888).

The spelling of 218670 in words is "two hundred eighteen thousand, six hundred seventy".