26808261 has 4 divisors (see below), whose sum is σ = 35744352. Its totient is φ = 17872172.

The previous prime is 26808247. The next prime is 26808263. The reversal of 26808261 is 16280862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26808261 - 2¹³ = 26800069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26808263) 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, 4468041 + ... + 4468046.

It is an arithmetic number, because the mean of its divisors is an integer number (8936088).

Almost surely, 2^26808261 is an apocalyptic number.

It is an amenable number.

26808261 is a deficient number, since it is larger than the sum of its proper divisors (8936091).

26808261 is an equidigital number, since it uses as much as digits as its factorization.

26808261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936090.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 26808261 is about 5177.6694564254. The cubic root of 26808261 is about 299.2881678749.

The spelling of 26808261 in words is "twenty-six million, eight hundred eight thousand, two hundred sixty-one".