22840056 has 96 divisors (see below), whose sum is σ = 66393600. Its totient is φ = 7348320.

The previous prime is 22840043. The next prime is 22840057. The reversal of 22840056 is 65004822.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22840057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60075 + ... + 60453.

It is an arithmetic number, because the mean of its divisors is an integer number (691600).

Almost surely, 2^22840056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22840056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33196800).

22840056 is an abundant number, since it is smaller than the sum of its proper divisors (43553544).

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

22840056 is a wasteful number, since it uses less digits than its factorization.

22840056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 22840056 is about 4779.1271169535. The cubic root of 22840056 is about 283.7259473618.

Adding to 22840056 its reverse (65004822), we get a palindrome (87844878).

The spelling of 22840056 in words is "twenty-two million, eight hundred forty thousand, fifty-six".