22306560 has 144 divisors (see below), whose sum is σ = 73633056. Its totient is φ = 5750784.

The previous prime is 22306553. The next prime is 22306561. The reversal of 22306560 is 6560322.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22306560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22306561) 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, 142002 + ... + 142158.

Almost surely, 2^22306560 is an apocalyptic number.

22306560 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 22306560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36816528).

22306560 is an abundant number, since it is smaller than the sum of its proper divisors (51326496).

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

22306560 is a wasteful number, since it uses less digits than its factorization.

22306560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 22306560 is about 4722.9821087952. The cubic root of 22306560 is about 281.4994389556.

Adding to 22306560 its reverse (6560322), we get a palindrome (28866882).

The spelling of 22306560 in words is "twenty-two million, three hundred six thousand, five hundred sixty".