22556440 has 32 divisors (see below), whose sum is σ = 50888880. Its totient is φ = 8998272.

The previous prime is 22556419. The next prime is 22556441. The reversal of 22556440 is 4465522.

It is a junction number, because it is equal to n+sod(n) for n = 22556399 and 22556408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22556441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25282 + ... + 26158.

Almost surely, 2^22556440 is an apocalyptic number.

22556440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22556440 is an abundant number, since it is smaller than the sum of its proper divisors (28332440).

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

22556440 is a wasteful number, since it uses less digits than its factorization.

22556440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 22556440 is about 4749.3620624248. The cubic root of 22556440 is about 282.5466652229.

It can be divided in two parts, 225 and 56440, that added together give a palindrome (56665).

The spelling of 22556440 in words is "twenty-two million, five hundred fifty-six thousand, four hundred forty".