218860 has 24 divisors (see below), whose sum is σ = 475776. Its totient is φ = 84480.

The previous prime is 218857. The next prime is 218873. The reversal of 218860 is 68812.

218860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444 + ... + 796.

It is an arithmetic number, because the mean of its divisors is an integer number (19824).

2²¹⁸⁸⁶⁰ is an apocalyptic number.

218860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237888).

218860 is an abundant number, since it is smaller than the sum of its proper divisors (256916).

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

218860 is a wasteful number, since it uses less digits than its factorization.

218860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 218860 is about 467.8247535135. The cubic root of 218860 is about 60.2636545557.

The spelling of 218860 in words is "two hundred eighteen thousand, eight hundred sixty".