22130440 has 64 divisors (see below), whose sum is σ = 53899200. Its totient is φ = 8149248.

The previous prime is 22130431. The next prime is 22130441. The reversal of 22130440 is 4403122.

It is not an unprimeable number, because it can be changed into a prime (22130441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 27727 + ... + 28513.

It is an arithmetic number, because the mean of its divisors is an integer number (842175).

Almost surely, 2^22130440 is an apocalyptic number.

22130440 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 22130440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26949600).

22130440 is an abundant number, since it is smaller than the sum of its proper divisors (31768760).

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

22130440 is a wasteful number, since it uses less digits than its factorization.

22130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22130440 is about 4704.3001604915. The cubic root of 22130440 is about 280.7566270403.

Adding to 22130440 its reverse (4403122), we get a palindrome (26533562).

The spelling of 22130440 in words is "twenty-two million, one hundred thirty thousand, four hundred forty".