22056540 has 96 divisors (see below), whose sum is σ = 70350336. Its totient is φ = 5111040.

The previous prime is 22056521. The next prime is 22056547. The reversal of 22056540 is 4565022.

It is a self number, because there is not a number n which added to its sum of digits gives 22056540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056547) 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 31 ways as a sum of consecutive naturals, for example, 14454 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (732816).

Almost surely, 2^22056540 is an apocalyptic number.

22056540 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 22056540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35175168).

22056540 is an abundant number, since it is smaller than the sum of its proper divisors (48293796).

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

22056540 is a wasteful number, since it uses less digits than its factorization.

22056540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 22056540 is about 4696.4390765771. The cubic root of 22056540 is about 280.4437690925.

The spelling of 22056540 in words is "twenty-two million, fifty-six thousand, five hundred forty".