22220320 has 48 divisors (see below), whose sum is σ = 53003160. Its totient is φ = 8802304.

The previous prime is 22220299. The next prime is 22220321. The reversal of 22220320 is 2302222.

It can be written as a sum of positive squares in 4 ways, for example, as 17943696 + 4276624 = 4236^2 + 2068^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22220320.

It is not an unprimeable number, because it can be changed into a prime (22220321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17466 + ... + 18694.

Almost surely, 2^22220320 is an apocalyptic number.

22220320 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 22220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26501580).

22220320 is an abundant number, since it is smaller than the sum of its proper divisors (30782840).

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

22220320 is a wasteful number, since it uses less digits than its factorization.

22220320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 22220320 is about 4713.8434424575. The cubic root of 22220320 is about 281.1361995566.

Adding to 22220320 its reverse (2302222), we get a palindrome (24522542).

The spelling of 22220320 in words is "twenty-two million, two hundred twenty thousand, three hundred twenty".