22441540 has 48 divisors (see below), whose sum is σ = 52073280. Its totient is φ = 8055680.

The previous prime is 22441519. The next prime is 22441541. The reversal of 22441540 is 4514422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22441541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17646 + ... + 18874.

It is an arithmetic number, because the mean of its divisors is an integer number (1084860).

Almost surely, 2^22441540 is an apocalyptic number.

22441540 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 22441540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26036640).

22441540 is an abundant number, since it is smaller than the sum of its proper divisors (29631740).

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

22441540 is a wasteful number, since it uses less digits than its factorization.

22441540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22441540 is about 4737.2502572695. The cubic root of 22441540 is about 282.0660945290.

Adding to 22441540 its reverse (4514422), we get a palindrome (26955962).

The spelling of 22441540 in words is "twenty-two million, four hundred forty-one thousand, five hundred forty".