22978985 has 16 divisors (see below), whose sum is σ = 29880576. Its totient is φ = 16896768.

The previous prime is 22978973. The next prime is 22978987. The reversal of 22978985 is 58987922.

It is a cyclic number.

It is not a de Polignac number, because 22978985 - 2²² = 18784681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22978987) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 512 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (1867536).

Almost surely, 2^22978985 is an apocalyptic number.

It is an amenable number.

22978985 is a deficient number, since it is larger than the sum of its proper divisors (6901591).

22978985 is a wasteful number, since it uses less digits than its factorization.

22978985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352.

The product of its digits is 725760, while the sum is 50.

The square root of 22978985 is about 4793.6400574094. The cubic root of 22978985 is about 284.3000572956.

The spelling of 22978985 in words is "twenty-two million, nine hundred seventy-eight thousand, nine hundred eighty-five".