218919368 has 16 divisors (see below), whose sum is σ = 432078000. Its totient is φ = 103698576.

The previous prime is 218919367. The next prime is 218919383. The reversal of 218919368 is 863919812.

It is not an unprimeable number, because it can be changed into a prime (218919367) 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, 719978 + ... + 720281.

It is an arithmetic number, because the mean of its divisors is an integer number (27004875).

Almost surely, 2^218919368 is an apocalyptic number.

It is an amenable number.

218919368 is a deficient number, since it is larger than the sum of its proper divisors (213158632).

218919368 is a wasteful number, since it uses less digits than its factorization.

218919368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440284 (or 1440280 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 218919368 is about 14795.9240333276. The cubic root of 218919368 is about 602.6910310609.

The spelling of 218919368 in words is "two hundred eighteen million, nine hundred nineteen thousand, three hundred sixty-eight".