22657889 has 6 divisors (see below), whose sum is σ = 24069414. Its totient is φ = 21324800.

The previous prime is 22657883. The next prime is 22657909. The reversal of 22657889 is 98875622.

It can be written as a sum of positive squares in 3 ways, for example, as 17572864 + 5085025 = 4192^2 + 2255^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22657889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22657883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38912 + ... + 39489.

It is an arithmetic number, because the mean of its divisors is an integer number (4011569).

Almost surely, 2^22657889 is an apocalyptic number.

It is an amenable number.

22657889 is a deficient number, since it is larger than the sum of its proper divisors (1411525).

22657889 is an equidigital number, since it uses as much as digits as its factorization.

22657889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78435 (or 78418 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 22657889 is about 4760.0303570461. The cubic root of 22657889 is about 282.9696221976.

The spelling of 22657889 in words is "twenty-two million, six hundred fifty-seven thousand, eight hundred eighty-nine".