22449289 has 4 divisors (see below), whose sum is σ = 22459140. Its totient is φ = 22439440.

The previous prime is 22449283. The next prime is 22449319. The reversal of 22449289 is 98294422.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14137600 + 8311689 = 3760^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 22449289 - 2⁵ = 22449257 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22449283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447 + ... + 6715.

It is an arithmetic number, because the mean of its divisors is an integer number (5614785).

Almost surely, 2^22449289 is an apocalyptic number.

It is an amenable number.

22449289 is a deficient number, since it is larger than the sum of its proper divisors (9851).

22449289 is an equidigital number, since it uses as much as digits as its factorization.

22449289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850.

The product of its digits is 82944, while the sum is 40.

The square root of 22449289 is about 4738.0680662059. The cubic root of 22449289 is about 282.0985563333.

The spelling of 22449289 in words is "twenty-two million, four hundred forty-nine thousand, two hundred eighty-nine".