22656985 has 12 divisors (see below), whose sum is σ = 29441772. Its totient is φ = 16730688.

The previous prime is 22656983. The next prime is 22657007. The reversal of 22656985 is 58965622.

It can be written as a sum of positive squares in 6 ways, for example, as 2442969 + 20214016 = 1563^2 + 4496^2 .

It is not a de Polignac number, because 22656985 - 2¹ = 22656983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22656983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12562 + ... + 14251.

It is an arithmetic number, because the mean of its divisors is an integer number (2453481).

Almost surely, 2^22656985 is an apocalyptic number.

It is an amenable number.

22656985 is a deficient number, since it is larger than the sum of its proper divisors (6784787).

22656985 is a wasteful number, since it uses less digits than its factorization.

22656985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26844 (or 26831 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 22656985 is about 4759.9353987213. The cubic root of 22656985 is about 282.9658588588.

The spelling of 22656985 in words is "twenty-two million, six hundred fifty-six thousand, nine hundred eighty-five".