218660930 has 16 divisors (see below), whose sum is σ = 414305280. Its totient is φ = 82860912.

The previous prime is 218660929. The next prime is 218660971. The reversal of 218660930 is 39066812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575234 + ... + 575613.

It is an arithmetic number, because the mean of its divisors is an integer number (25894080).

Almost surely, 2^218660930 is an apocalyptic number.

218660930 is a deficient number, since it is larger than the sum of its proper divisors (195644350).

218660930 is a wasteful number, since it uses less digits than its factorization.

218660930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150873.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 218660930 is about 14787.1880355935. The cubic root of 218660930 is about 602.4537753716.

The spelling of 218660930 in words is "two hundred eighteen million, six hundred sixty thousand, nine hundred thirty".