22124872 has 64 divisors (see below), whose sum is σ = 52848000. Its totient is φ = 8608320.

The previous prime is 22124857. The next prime is 22124881. The reversal of 22124872 is 27842122.

It is a super-2 number, since 2×22124872² = 979019922032768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22124872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29818 + ... + 30550.

It is an arithmetic number, because the mean of its divisors is an integer number (825750).

Almost surely, 2^22124872 is an apocalyptic number.

22124872 is a gapful number since it is divisible by the number (22) 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 22124872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26424000).

22124872 is an abundant number, since it is smaller than the sum of its proper divisors (30723128).

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

22124872 is a wasteful number, since it uses less digits than its factorization.

22124872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 753 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 22124872 is about 4703.7083242905. The cubic root of 22124872 is about 280.7330790220.

Adding to 22124872 its reverse (27842122), we get a palindrome (49966994).

The spelling of 22124872 in words is "twenty-two million, one hundred twenty-four thousand, eight hundred seventy-two".