2818220 has 48 divisors (see below), whose sum is σ = 6320160. Its totient is φ = 1053696.

The previous prime is 2818219. The next prime is 2818223. The reversal of 2818220 is 228182.

It is not an unprimeable number, because it can be changed into a prime (2818223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24884 + ... + 24996.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2^2818220 is an apocalyptic number.

2818220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2818220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3160080).

2818220 is an abundant number, since it is smaller than the sum of its proper divisors (3501940).

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

2818220 is a wasteful number, since it uses less digits than its factorization.

2818220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2818220 is about 1678.7554914281. The cubic root of 2818220 is about 141.2510324408.

The spelling of 2818220 in words is "two million, eight hundred eighteen thousand, two hundred twenty".