22845564 has 90 divisors (see below), whose sum is σ = 69521760. Its totient is φ = 6522768.

The previous prime is 22845551. The next prime is 22845577. The reversal of 22845564 is 46554822.

It is a happy number.

22845564 is a `hidden beast` number, since 22 + 84 + 556 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (22845551) and next prime (22845577).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15157 + ... + 16595.

It is an arithmetic number, because the mean of its divisors is an integer number (772464).

Almost surely, 2^22845564 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 22845564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34760880).

22845564 is an abundant number, since it is smaller than the sum of its proper divisors (46676196).

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

22845564 is a wasteful number, since it uses less digits than its factorization.

22845564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1451 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 22845564 is about 4779.7033380744. The cubic root of 22845564 is about 283.7487528651.

It can be divided in two parts, 22845 and 564, that added together give a square (23409 = 153²).

The spelling of 22845564 in words is "twenty-two million, eight hundred forty-five thousand, five hundred sixty-four".