22405656 has 64 divisors (see below), whose sum is σ = 68947200. Its totient is φ = 5908608.

The previous prime is 22405651. The next prime is 22405679. The reversal of 22405656 is 65650422.

22405656 is a modest number, since divided by 5656 gives 2240 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22405651) 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 15 ways as a sum of consecutive naturals, for example, 2946 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^22405656 is an apocalyptic number.

22405656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22405656 is an abundant number, since it is smaller than the sum of its proper divisors (46541544).

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

22405656 is a wasteful number, since it uses less digits than its factorization.

22405656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288 (or 10284 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 22405656 is about 4733.4613128238. The cubic root of 22405656 is about 281.9156731917.

The spelling of 22405656 in words is "twenty-two million, four hundred five thousand, six hundred fifty-six".