22008564 has 48 divisors (see below), whose sum is σ = 59035200. Its totient is φ = 7082208.

The previous prime is 22008559. The next prime is 22008577. The reversal of 22008564 is 46580022.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (1229900).

Almost surely, 2^22008564 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 22008564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29517600).

22008564 is an abundant number, since it is smaller than the sum of its proper divisors (37026636).

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

22008564 is a wasteful number, since it uses less digits than its factorization.

22008564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069 (or 7061 counting only the distinct ones).

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

The square root of 22008564 is about 4691.3285964639. The cubic root of 22008564 is about 280.2402869318.

Adding to 22008564 its reverse (46580022), we get a palindrome (68588586).

The spelling of 22008564 in words is "twenty-two million, eight thousand, five hundred sixty-four".