22788641 has 4 divisors (see below), whose sum is σ = 22798212. Its totient is φ = 22779072.

The previous prime is 22788637. The next prime is 22788659. The reversal of 22788641 is 14688722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6150400 + 16638241 = 2480^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 22788641 - 2² = 22788637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22788595 and 22788604.

It is not an unprimeable number, because it can be changed into a prime (22788611) 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 3 ways as a sum of consecutive naturals, for example, 1901 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (5699553).

Almost surely, 2^22788641 is an apocalyptic number.

It is an amenable number.

22788641 is a deficient number, since it is larger than the sum of its proper divisors (9571).

22788641 is an equidigital number, since it uses as much as digits as its factorization.

22788641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570.

The product of its digits is 43008, while the sum is 38.

The square root of 22788641 is about 4773.7449659570. The cubic root of 22788641 is about 283.5128899535.

The spelling of 22788641 in words is "twenty-two million, seven hundred eighty-eight thousand, six hundred forty-one".