22556040 has 128 divisors (see below), whose sum is σ = 76809600. Its totient is φ = 5253120.

The previous prime is 22555993. The next prime is 22556047. The reversal of 22556040 is 4065522.

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 22556040.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 761 × 39 × 760.

It is not an unprimeable number, because it can be changed into a prime (22556047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29260 + ... + 30020.

It is an arithmetic number, because the mean of its divisors is an integer number (600075).

Almost surely, 2^22556040 is an apocalyptic number.

22556040 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 22556040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38404800).

22556040 is an abundant number, since it is smaller than the sum of its proper divisors (54253560).

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

22556040 is a wasteful number, since it uses less digits than its factorization.

22556040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 803 counting only the distinct ones).

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

The square root of 22556040 is about 4749.3199513193. The cubic root of 22556040 is about 282.5449950520.

It can be divided in two parts, 225 and 56040, that added together give a palindrome (56265).

The spelling of 22556040 in words is "twenty-two million, five hundred fifty-six thousand, forty".