22655556 has 108 divisors (see below), whose sum is σ = 72037056. Its totient is φ = 5876640.

The previous prime is 22655531. The next prime is 22655557. The reversal of 22655556 is 65555622.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22655556.

It is not an unprimeable number, because it can be changed into a prime (22655557) 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 35 ways as a sum of consecutive naturals, for example, 30121 + ... + 30863.

Almost surely, 2^22655556 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 22655556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36018528).

22655556 is an abundant number, since it is smaller than the sum of its proper divisors (49381500).

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

22655556 is a wasteful number, since it uses less digits than its factorization.

22655556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 766 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 22655556 is about 4759.7852892751. The cubic root of 22655556 is about 282.9599097484.

The spelling of 22655556 in words is "twenty-two million, six hundred fifty-five thousand, five hundred fifty-six".