22788644 has 6 divisors (see below), whose sum is σ = 39880134. Its totient is φ = 11394320.

The previous prime is 22788637. The next prime is 22788659. The reversal of 22788644 is 44688722.

It can be written as a sum of positive squares in only one way, i.e., 22657600 + 131044 = 4760^2 + 362^2 .

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 as a sum of consecutive naturals, namely, 2848577 + ... + 2848584.

It is an arithmetic number, because the mean of its divisors is an integer number (6646689).

Almost surely, 2^22788644 is an apocalyptic number.

It is an amenable number.

22788644 is a deficient number, since it is larger than the sum of its proper divisors (17091490).

22788644 is a wasteful number, since it uses less digits than its factorization.

22788644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697165 (or 5697163 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 22788644 is about 4773.7452801757. The cubic root of 22788644 is about 283.5129023944.

It can be divided in two parts, 22788 and 644, that added together give a palindrome (23432).

The spelling of 22788644 in words is "twenty-two million, seven hundred eighty-eight thousand, six hundred forty-four".