218345868 has 60 divisors (see below), whose sum is σ = 614718720. Its totient is φ = 67182048.

The previous prime is 218345867. The next prime is 218345887. The reversal of 218345868 is 868543812.

It is not an unprimeable number, because it can be changed into a prime (218345861) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21708 + ... + 30131.

It is an arithmetic number, because the mean of its divisors is an integer number (10245312).

Almost surely, 2^218345868 is an apocalyptic number.

It is an amenable number.

218345868 is an abundant number, since it is smaller than the sum of its proper divisors (396372852).

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

218345868 is a wasteful number, since it uses less digits than its factorization.

218345868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51868 (or 51857 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 218345868 is about 14776.5309866694. The cubic root of 218345868 is about 602.1642837397.

The spelling of 218345868 in words is "two hundred eighteen million, three hundred forty-five thousand, eight hundred sixty-eight".