22805985 has 16 divisors (see below), whose sum is σ = 38410560. Its totient is φ = 11522880.

The previous prime is 22805971. The next prime is 22805989. The reversal of 22805985 is 58950822.

It is not a de Polignac number, because 22805985 - 2⁴ = 22805969 is a prime.

It is a super-2 number, since 2×22805985² = 1040225903640450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22805989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39726 + ... + 40295.

It is an arithmetic number, because the mean of its divisors is an integer number (2400660).

Almost surely, 2^22805985 is an apocalyptic number.

It is an amenable number.

22805985 is a deficient number, since it is larger than the sum of its proper divisors (15604575).

22805985 is a wasteful number, since it uses less digits than its factorization.

22805985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80048.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 22805985 is about 4775.5612235632. The cubic root of 22805985 is about 283.5847971318.

The spelling of 22805985 in words is "twenty-two million, eight hundred five thousand, nine hundred eighty-five".