2118220 has 24 divisors (see below), whose sum is σ = 4791024. Its totient is φ = 782016.

The previous prime is 2118209. The next prime is 2118239. The reversal of 2118220 is 228112.

It is a junction number, because it is equal to n+sod(n) for n = 2118194 and 2118203.

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, 3814 + ... + 4333.

It is an arithmetic number, because the mean of its divisors is an integer number (199626).

2^2118220 is an apocalyptic number.

2118220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118220 is an abundant number, since it is smaller than the sum of its proper divisors (2672804).

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

2118220 is a wasteful number, since it uses less digits than its factorization.

2118220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8169 (or 8167 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2118220 is about 1455.4105949869. The cubic root of 2118220 is about 128.4272021766.

The spelling of 2118220 in words is "two million, one hundred eighteen thousand, two hundred twenty".