22688249 has 6 divisors (see below), whose sum is σ = 23444730. Its totient is φ = 21955440.

The previous prime is 22688231. The next prime is 22688257. The reversal of 22688249 is 94288622.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 6943225 = 3968^2 + 2635^2 .

It is not a de Polignac number, because 22688249 - 2¹² = 22684153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22688209) 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, 10844 + ... + 12765.

It is an arithmetic number, because the mean of its divisors is an integer number (3907455).

Almost surely, 2^22688249 is an apocalyptic number.

It is an amenable number.

22688249 is a deficient number, since it is larger than the sum of its proper divisors (756481).

22688249 is an equidigital number, since it uses as much as digits as its factorization.

22688249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23671 (or 23640 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 22688249 is about 4763.2183447749. The cubic root of 22688249 is about 283.0959523468.

The spelling of 22688249 in words is "twenty-two million, six hundred eighty-eight thousand, two hundred forty-nine".