2218986 has 48 divisors (see below), whose sum is σ = 5997888. Its totient is φ = 576000.

The previous prime is 2218969. The next prime is 2218999. The reversal of 2218986 is 6898122.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2218986.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 586 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (124956).

2^2218986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2218986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2998944).

2218986 is an abundant number, since it is smaller than the sum of its proper divisors (3778902).

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

2218986 is a wasteful number, since it uses less digits than its factorization.

2218986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1624 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2218986 is about 1489.6261275904. The cubic root of 2218986 is about 130.4322103551.

The spelling of 2218986 in words is "two million, two hundred eighteen thousand, nine hundred eighty-six".