22440004240 has 20 divisors (see below), whose sum is σ = 52173010044. Its totient is φ = 8976001664.

The previous prime is 22440004229. The next prime is 22440004243. The reversal of 22440004240 is 4240004422.

It can be written as a sum of positive squares in 2 ways, for example, as 3294300816 + 19145703424 = 57396^2 + 138368^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22440004243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140249947 + ... + 140250106.

Almost surely, 2^22440004240 is an apocalyptic number.

22440004240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22440004240 is an abundant number, since it is smaller than the sum of its proper divisors (29733005804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22440004240 is a wasteful number, since it uses less digits than its factorization.

22440004240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280500066 (or 280500060 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 22440004240 its reverse (4240004422), we get a palindrome (26680008662).

The spelling of 22440004240 in words is "twenty-two billion, four hundred forty million, four thousand, two hundred forty".