22243140 has 96 divisors (see below), whose sum is σ = 73301760. Its totient is φ = 5580288.

The previous prime is 22243127. The next prime is 22243141. The reversal of 22243140 is 4134222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22243141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7969 + ... + 10391.

It is an arithmetic number, because the mean of its divisors is an integer number (763560).

Almost surely, 2^22243140 is an apocalyptic number.

22243140 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 22243140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36650880).

22243140 is an abundant number, since it is smaller than the sum of its proper divisors (51058620).

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

22243140 is a wasteful number, since it uses less digits than its factorization.

22243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2450 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22243140 is about 4716.2633514256. The cubic root of 22243140 is about 281.2324077885.

Adding to 22243140 its reverse (4134222), we get a palindrome (26377362).

The spelling of 22243140 in words is "twenty-two million, two hundred forty-three thousand, one hundred forty".