22408445 has 18 divisors (see below), whose sum is σ = 28236078. Its totient is φ = 17071488.

The previous prime is 22408403. The next prime is 22408457. The reversal of 22408445 is 54480422.

It can be written as a sum of positive squares in 9 ways, for example, as 2951524 + 19456921 = 1718^2 + 4411^2 .

It is not a de Polignac number, because 22408445 - 2⁸ = 22408189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 306929 + ... + 307001.

It is an arithmetic number, because the mean of its divisors is an integer number (1568671).

Almost surely, 2^22408445 is an apocalyptic number.

It is an amenable number.

22408445 is a deficient number, since it is larger than the sum of its proper divisors (5827633).

22408445 is an frugal number, since it uses more digits than its factorization.

22408445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 22408445 is about 4733.7559083671. The cubic root of 22408445 is about 281.9273700922.

Adding to 22408445 its reverse (54480422), we get a palindrome (76888867).

The spelling of 22408445 in words is "twenty-two million, four hundred eight thousand, four hundred forty-five".