218668000 has 48 divisors (see below), whose sum is σ = 537277104. Its totient is φ = 87465600.

The previous prime is 218667961. The next prime is 218668007. The reversal of 218668000 is 866812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218668007) 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, 23334 + ... + 31333.

It is an arithmetic number, because the mean of its divisors is an integer number (11193273).

Almost surely, 2^218668000 is an apocalyptic number.

218668000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218668000 is an abundant number, since it is smaller than the sum of its proper divisors (318609104).

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

218668000 is an equidigital number, since it uses as much as digits as its factorization.

218668000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54692 (or 54674 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 218668000 is about 14787.4270919589. The cubic root of 218668000 is about 602.4602683808.

The spelling of 218668000 in words is "two hundred eighteen million, six hundred sixty-eight thousand".