1022443220 has 24 divisors (see below), whose sum is σ = 2148184584. Its totient is φ = 408776576.

The previous prime is 1022443187. The next prime is 1022443243. The reversal of 1022443220 is 223442201.

It can be written as a sum of positive squares in 4 ways, for example, as 88774084 + 933669136 = 9422^2 + 30556^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1022443192 and 1022443201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33314 + ... + 56166.

It is an arithmetic number, because the mean of its divisors is an integer number (89507691).

Almost surely, 2^1022443220 is an apocalyptic number.

1022443220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022443220 is an abundant number, since it is smaller than the sum of its proper divisors (1125741364).

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

1022443220 is a wasteful number, since it uses less digits than its factorization.

1022443220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25099 (or 25097 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1022443220 is about 31975.6660603028. Note that the first 3 decimals coincide. The cubic root of 1022443220 is about 1007.4257944185.

Adding to 1022443220 its reverse (223442201), we get a palindrome (1245885421).

The spelling of 1022443220 in words is "one billion, twenty-two million, four hundred forty-three thousand, two hundred twenty".