26805865 has 8 divisors (see below), whose sum is σ = 33860160. Its totient is φ = 20315952.

The previous prime is 26805851. The next prime is 26805869. The reversal of 26805865 is 56850862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26805865 - 2¹¹ = 26803817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26805869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140989 + ... + 141178.

It is an arithmetic number, because the mean of its divisors is an integer number (4232520).

Almost surely, 2^26805865 is an apocalyptic number.

It is an amenable number.

26805865 is a deficient number, since it is larger than the sum of its proper divisors (7054295).

26805865 is a wasteful number, since it uses less digits than its factorization.

26805865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282191.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 26805865 is about 5177.4380730241. The cubic root of 26805865 is about 299.2792512724.

The spelling of 26805865 in words is "twenty-six million, eight hundred five thousand, eight hundred sixty-five".