22004422 has 16 divisors (see below), whose sum is σ = 37573632. Its totient is φ = 9566920.

The previous prime is 22004419. The next prime is 22004429. The reversal of 22004422 is 22440022.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22004396 and 22004405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22004429) 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 7 ways as a sum of consecutive naturals, for example, 21238 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (2348352).

Almost surely, 2^22004422 is an apocalyptic number.

22004422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22004422 is a deficient number, since it is larger than the sum of its proper divisors (15569210).

22004422 is a wasteful number, since it uses less digits than its factorization.

22004422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43523.

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

The square root of 22004422 is about 4690.8871229225. The cubic root of 22004422 is about 280.2227054714. Note that the first 3 decimals are identical.

Adding to 22004422 its reverse (22440022), we get a palindrome (44444444).

Subtracting 22004422 from its reverse (22440022), we obtain a square (435600 = 660²).

The spelling of 22004422 in words is "twenty-two million, four thousand, four hundred twenty-two".