22127872 has 72 divisors (see below), whose sum is σ = 48790280. Its totient is φ = 9953280.

The previous prime is 22127849. The next prime is 22127873. The reversal of 22127872 is 27872122.

It can be written as a sum of positive squares in 4 ways, for example, as 256 + 22127616 = 16^2 + 4704^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22127873) 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, 202954 + ... + 203062.

Almost surely, 2^22127872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22127872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24395140).

22127872 is an abundant number, since it is smaller than the sum of its proper divisors (26662408).

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

22127872 is a wasteful number, since it uses less digits than its factorization.

22127872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 185 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 22127872 is about 4704.0272108057. The cubic root of 22127872 is about 280.7457670227.

Adding to 22127872 its reverse (27872122), we get a palindrome (49999994).

The spelling of 22127872 in words is "twenty-two million, one hundred twenty-seven thousand, eight hundred seventy-two".