2220022220 has 96 divisors (see below), whose sum is σ = 5261254656. Its totient is φ = 781228800.

The previous prime is 2220022201. The next prime is 2220022243. The reversal of 2220022220 is 222200222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2220022195 and 2220022204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537965 + ... + 542075.

It is an arithmetic number, because the mean of its divisors is an integer number (54804736).

Almost surely, 2^2220022220 is an apocalyptic number.

2220022220 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 2220022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2630627328).

2220022220 is an abundant number, since it is smaller than the sum of its proper divisors (3041232436).

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

2220022220 is a wasteful number, since it uses less digits than its factorization.

2220022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231 (or 4229 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2220022220 is about 47117.1117535869. Note that the first 3 decimals coincide. The cubic root of 2220022220 is about 1304.5251023259.

Adding to 2220022220 its reverse (222200222), we get a palindrome (2442222442).

The spelling of 2220022220 in words is "two billion, two hundred twenty million, twenty-two thousand, two hundred twenty".