218380208 has 20 divisors (see below), whose sum is σ = 437702640. Its totient is φ = 105424704.

The previous prime is 218380207. The next prime is 218380223. The reversal of 218380208 is 802083812.

It is a super-2 number, since 2×218380208² = 95379830492246528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218380207) 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, 234860 + ... + 235787.

It is an arithmetic number, because the mean of its divisors is an integer number (21885132).

Almost surely, 2^218380208 is an apocalyptic number.

It is an amenable number.

218380208 is an abundant number, since it is smaller than the sum of its proper divisors (219322432).

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

218380208 is a wasteful number, since it uses less digits than its factorization.

218380208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470684 (or 470678 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 218380208 is about 14777.6929187204. The cubic root of 218380208 is about 602.1958502290.

The spelling of 218380208 in words is "two hundred eighteen million, three hundred eighty thousand, two hundred eight".