22788813 has 16 divisors (see below), whose sum is σ = 31504896. Its totient is φ = 14637120.

The previous prime is 22788811. The next prime is 22788817. The reversal of 22788813 is 31888722.

It is not a de Polignac number, because 22788813 - 2¹ = 22788811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22788811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29095 + ... + 29867.

It is an arithmetic number, because the mean of its divisors is an integer number (1969056).

Almost surely, 2^22788813 is an apocalyptic number.

It is an amenable number.

22788813 is a deficient number, since it is larger than the sum of its proper divisors (8716083).

22788813 is a wasteful number, since it uses less digits than its factorization.

22788813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

The product of its digits is 43008, while the sum is 39.

The square root of 22788813 is about 4773.7629811292. The cubic root of 22788813 is about 283.5136032342.

Subtracting 22788813 from its reverse (31888722), we obtain a palindrome (9099909).

The spelling of 22788813 in words is "twenty-two million, seven hundred eighty-eight thousand, eight hundred thirteen".