26228665 has 4 divisors (see below), whose sum is σ = 31474404. Its totient is φ = 20982928.

The previous prime is 26228659. The next prime is 26228677. The reversal of 26228665 is 56682262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3988009 + 22240656 = 1997^2 + 4716^2 .

It is a cyclic number.

It is not a de Polignac number, because 26228665 - 2⁵ = 26228633 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2622862 + ... + 2622871.

It is an arithmetic number, because the mean of its divisors is an integer number (7868601).

Almost surely, 2^26228665 is an apocalyptic number.

It is an amenable number.

26228665 is a deficient number, since it is larger than the sum of its proper divisors (5245739).

26228665 is an equidigital number, since it uses as much as digits as its factorization.

26228665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245738.

The product of its digits is 69120, while the sum is 37.

The square root of 26228665 is about 5121.3928769428. The cubic root of 26228665 is about 297.1155592592.

The spelling of 26228665 in words is "twenty-six million, two hundred twenty-eight thousand, six hundred sixty-five".