22041440 has 48 divisors (see below), whose sum is σ = 52354512. Its totient is φ = 8769024.

The previous prime is 22041433. The next prime is 22041443. The reversal of 22041440 is 4414022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22041443) 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, 55322 + ... + 55718.

It is an arithmetic number, because the mean of its divisors is an integer number (1090719).

Almost surely, 2^22041440 is an apocalyptic number.

22041440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22041440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26177256).

22041440 is an abundant number, since it is smaller than the sum of its proper divisors (30313072).

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

22041440 is a wasteful number, since it uses less digits than its factorization.

22041440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22041440 is about 4694.8312003734. The cubic root of 22041440 is about 280.3797568216.

Adding to 22041440 its reverse (4414022), we get a palindrome (26455462).

The spelling of 22041440 in words is "twenty-two million, forty-one thousand, four hundred forty".