22223320 has 64 divisors (see below), whose sum is σ = 57657600. Its totient is φ = 7551360.

The previous prime is 22223291. The next prime is 22223323. The reversal of 22223320 is 2332222.

It is a junction number, because it is equal to n+sod(n) for n = 22223294 and 22223303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223323) 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, 38635 + ... + 39205.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^22223320 is an apocalyptic number.

22223320 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 22223320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28828800).

22223320 is an abundant number, since it is smaller than the sum of its proper divisors (35434280).

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

22223320 is a wasteful number, since it uses less digits than its factorization.

22223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 22223320 is about 4714.1616433890. The cubic root of 22223320 is about 281.1488511992.

Adding to 22223320 its reverse (2332222), we get a palindrome (24555542).

The spelling of 22223320 in words is "twenty-two million, two hundred twenty-three thousand, three hundred twenty".