22409320 has 16 divisors (see below), whose sum is σ = 50421060. Its totient is φ = 8963712.

The previous prime is 22409297. The next prime is 22409323. The reversal of 22409320 is 2390422.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 1779556 = 4542^2 + 1334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22409291 and 22409300.

It is not an unprimeable number, because it can be changed into a prime (22409323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280077 + ... + 280156.

Almost surely, 2^22409320 is an apocalyptic number.

22409320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22409320 is an abundant number, since it is smaller than the sum of its proper divisors (28011740).

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

22409320 is a wasteful number, since it uses less digits than its factorization.

22409320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560244 (or 560240 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22409320 is about 4733.8483287913. The cubic root of 22409320 is about 281.9310395903.

Adding to 22409320 its reverse (2390422), we get a palindrome (24799742).

The spelling of 22409320 in words is "twenty-two million, four hundred nine thousand, three hundred twenty".