22985657 has 4 divisors (see below), whose sum is σ = 23037300. Its totient is φ = 22934016.

The previous prime is 22985639. The next prime is 22985659. The reversal of 22985657 is 75658922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5812921 + 17172736 = 2411^2 + 4144^2 .

It is a cyclic number.

It is not a de Polignac number, because 22985657 - 2⁸ = 22985401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22985659) 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 3 ways as a sum of consecutive naturals, for example, 25148 + ... + 26045.

It is an arithmetic number, because the mean of its divisors is an integer number (5759325).

Almost surely, 2^22985657 is an apocalyptic number.

It is an amenable number.

22985657 is a deficient number, since it is larger than the sum of its proper divisors (51643).

22985657 is an equidigital number, since it uses as much as digits as its factorization.

22985657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51642.

The product of its digits is 302400, while the sum is 44.

The square root of 22985657 is about 4794.3359289895. The cubic root of 22985657 is about 284.3275703534.

The spelling of 22985657 in words is "twenty-two million, nine hundred eighty-five thousand, six hundred fifty-seven".