22056440 has 64 divisors (see below), whose sum is σ = 58276800. Its totient is φ = 7354368.

The previous prime is 22056413. The next prime is 22056449. The reversal of 22056440 is 4465022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056449) 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, 9296 + ... + 11424.

It is an arithmetic number, because the mean of its divisors is an integer number (910575).

Almost surely, 2^22056440 is an apocalyptic number.

22056440 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 22056440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29138400).

22056440 is an abundant number, since it is smaller than the sum of its proper divisors (36220360).

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

22056440 is a wasteful number, since it uses less digits than its factorization.

22056440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2180 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 22056440 is about 4696.4284302010. The cubic root of 22056440 is about 280.4433452663.

The spelling of 22056440 in words is "twenty-two million, fifty-six thousand, four hundred forty".