218864368 has 10 divisors (see below), whose sum is σ = 424049744. Its totient is φ = 109432176.

The previous prime is 218864357. The next prime is 218864369. The reversal of 218864368 is 863468812.

218864368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×218864368² = 95803223160078848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218864369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6839496 + ... + 6839527.

Almost surely, 2^218864368 is an apocalyptic number.

It is an amenable number.

218864368 is a deficient number, since it is larger than the sum of its proper divisors (205185376).

218864368 is a wasteful number, since it uses less digits than its factorization.

218864368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13679031 (or 13679025 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 218864368 is about 14794.0652965978. The cubic root of 218864368 is about 602.6405546635.

The spelling of 218864368 in words is "two hundred eighteen million, eight hundred sixty-four thousand, three hundred sixty-eight".