22245440 has 56 divisors (see below), whose sum is σ = 60545472. Its totient is φ = 7626240.

The previous prime is 22245427. The next prime is 22245449. The reversal of 22245440 is 4454222.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (22245449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2726 + ... + 7205.

Almost surely, 2^22245440 is an apocalyptic number.

22245440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22245440 is an abundant number, since it is smaller than the sum of its proper divisors (38300032).

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

22245440 is an equidigital number, since it uses as much as digits as its factorization.

22245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9955 (or 9945 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 22245440 is about 4716.5071822271. The cubic root of 22245440 is about 281.2421008481.

Adding to 22245440 its reverse (4454222), we get a palindrome (26699662).

The spelling of 22245440 in words is "twenty-two million, two hundred forty-five thousand, four hundred forty".