2218818 has 24 divisors (see below), whose sum is σ = 5162832. Its totient is φ = 633864.

The previous prime is 2218807. The next prime is 2218831. The reversal of 2218818 is 8188122.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3480 + ... + 4067.

It is an arithmetic number, because the mean of its divisors is an integer number (215118).

2^2218818 is an apocalyptic number.

2218818 is an abundant number, since it is smaller than the sum of its proper divisors (2944014).

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

2218818 is a wasteful number, since it uses less digits than its factorization.

2218818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7566 (or 7559 counting only the distinct ones).

The product of its digits is 2048, while the sum is 30.

The square root of 2218818 is about 1489.5697365347. The cubic root of 2218818 is about 130.4289185866.

The spelling of 2218818 in words is "two million, two hundred eighteen thousand, eight hundred eighteen".