22404220 has 12 divisors (see below), whose sum is σ = 47048904. Its totient is φ = 8961680.

The previous prime is 22404209. The next prime is 22404229. The reversal of 22404220 is 2240422.

It is a junction number, because it is equal to n+sod(n) for n = 22404194 and 22404203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560086 + ... + 560125.

It is an arithmetic number, because the mean of its divisors is an integer number (3920742).

Almost surely, 2^22404220 is an apocalyptic number.

22404220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22404220 is an abundant number, since it is smaller than the sum of its proper divisors (24644684).

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

22404220 is a wasteful number, since it uses less digits than its factorization.

22404220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120220 (or 1120218 counting only the distinct ones).

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

The square root of 22404220 is about 4733.3096243538. The cubic root of 22404220 is about 281.9096503143.

Adding to 22404220 its reverse (2240422), we get a palindrome (24644642).

The spelling of 22404220 in words is "twenty-two million, four hundred four thousand, two hundred twenty".