22228805 has 8 divisors (see below), whose sum is σ = 26703000. Its totient is φ = 17764096.

The previous prime is 22228793. The next prime is 22228813. The reversal of 22228805 is 50882222.

It can be written as a sum of positive squares in 4 ways, for example, as 391876 + 21836929 = 626^2 + 4673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22228805 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 4721 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (3337875).

Almost surely, 2^22228805 is an apocalyptic number.

It is an amenable number.

22228805 is a deficient number, since it is larger than the sum of its proper divisors (4474195).

22228805 is a wasteful number, since it uses less digits than its factorization.

22228805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 22228805 is about 4714.7433652321. The cubic root of 22228805 is about 281.1719796756.

The spelling of 22228805 in words is "twenty-two million, two hundred twenty-eight thousand, eight hundred five".