22224220 has 12 divisors (see below), whose sum is σ = 46670904. Its totient is φ = 8889680.

The previous prime is 22224217. The next prime is 22224229. The reversal of 22224220 is 2242222.

It is a junction number, because it is equal to n+sod(n) for n = 22224194 and 22224203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555586 + ... + 555625.

It is an arithmetic number, because the mean of its divisors is an integer number (3889242).

Almost surely, 2^22224220 is an apocalyptic number.

22224220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22224220 is an abundant number, since it is smaller than the sum of its proper divisors (24446684).

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

22224220 is a wasteful number, since it uses less digits than its factorization.

22224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111220 (or 1111218 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22224220 is about 4714.2570994803. The cubic root of 22224220 is about 281.1526464700.

Adding to 22224220 its reverse (2242222), we get a palindrome (24466442).

It can be divided in two parts, 222 and 24220, that added together give a palindrome (24442).

The spelling of 22224220 in words is "twenty-two million, two hundred twenty-four thousand, two hundred twenty".