218793868 has 12 divisors (see below), whose sum is σ = 383036472. Its totient is φ = 109354880.

The previous prime is 218793863. The next prime is 218793899. The reversal of 218793868 is 868397812.

It is not an unprimeable number, because it can be changed into a prime (218793863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3171 + ... + 21157.

It is an arithmetic number, because the mean of its divisors is an integer number (31919706).

Almost surely, 2^218793868 is an apocalyptic number.

It is an amenable number.

218793868 is a deficient number, since it is larger than the sum of its proper divisors (164242604).

218793868 is a wasteful number, since it uses less digits than its factorization.

218793868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21032 (or 21030 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 218793868 is about 14791.6823924799. The cubic root of 218793868 is about 602.5758407311.

The spelling of 218793868 in words is "two hundred eighteen million, seven hundred ninety-three thousand, eight hundred sixty-eight".