22443140 has 12 divisors (see below), whose sum is σ = 47130636. Its totient is φ = 8977248.

The previous prime is 22443139. The next prime is 22443229. The reversal of 22443140 is 4134422.

It can be written as a sum of positive squares in 2 ways, for example, as 17505856 + 4937284 = 4184^2 + 2222^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1122157 = 22443140 / (2 + 2 + 4 + 4 + 3 + 1 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561059 + ... + 561098.

It is an arithmetic number, because the mean of its divisors is an integer number (3927553).

Almost surely, 2^22443140 is an apocalyptic number.

22443140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22443140 is an abundant number, since it is smaller than the sum of its proper divisors (24687496).

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

22443140 is a wasteful number, since it uses less digits than its factorization.

22443140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122166 (or 1122164 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22443140 is about 4737.4191285973. The cubic root of 22443140 is about 282.0727977978.

Adding to 22443140 its reverse (4134422), we get a palindrome (26577562).

The spelling of 22443140 in words is "twenty-two million, four hundred forty-three thousand, one hundred forty".