218342286 has 24 divisors (see below), whose sum is σ = 473689944. Its totient is φ = 72686160.

The previous prime is 218342239. The next prime is 218342287. The reversal of 218342286 is 682243812.

It is a self number, because there is not a number n which added to its sum of digits gives 218342286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218342287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7120 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (19737081).

Almost surely, 2^218342286 is an apocalyptic number.

218342286 is an abundant number, since it is smaller than the sum of its proper divisors (255347658).

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

218342286 is a wasteful number, since it uses less digits than its factorization.

218342286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15776 (or 15773 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 218342286 is about 14776.4097804575. The cubic root of 218342286 is about 602.1609908535.

The spelling of 218342286 in words is "two hundred eighteen million, three hundred forty-two thousand, two hundred eighty-six".