22821044 has 12 divisors (see below), whose sum is σ = 40002564. Its totient is φ = 11391744.

The previous prime is 22821031. The next prime is 22821077. The reversal of 22821044 is 44012822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6916900 + 15904144 = 2630^2 + 3988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (3333547).

Almost surely, 2^22821044 is an apocalyptic number.

It is an amenable number.

22821044 is a deficient number, since it is larger than the sum of its proper divisors (17181520).

22821044 is a wasteful number, since it uses less digits than its factorization.

22821044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394 (or 9392 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 22821044 is about 4777.1376367025. The cubic root of 22821044 is about 283.6472012749.

Adding to 22821044 its reverse (44012822), we get a palindrome (66833866).

The spelling of 22821044 in words is "twenty-two million, eight hundred twenty-one thousand, forty-four".