2218068 has 18 divisors (see below), whose sum is σ = 5606874. Its totient is φ = 739344.

The previous prime is 2218067. The next prime is 2218091. The reversal of 2218068 is 8608122.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 1077444 = 1068^2 + 1038^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30771 + ... + 30842.

It is an arithmetic number, because the mean of its divisors is an integer number (311493).

2^2218068 is an apocalyptic number.

It is an amenable number.

2218068 is an abundant number, since it is smaller than the sum of its proper divisors (3388806).

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

2218068 is a wasteful number, since it uses less digits than its factorization.

2218068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61623 (or 61618 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2218068 is about 1489.3179647073. The cubic root of 2218068 is about 130.4142211647.

The spelling of 2218068 in words is "two million, two hundred eighteen thousand, sixty-eight".