26816865 has 16 divisors (see below), whose sum is σ = 43104768. Its totient is φ = 14236416.

The previous prime is 26816863. The next prime is 26816893. The reversal of 26816865 is 56861862.

It is not a de Polignac number, because 26816865 - 2¹ = 26816863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26816861) 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 15 ways as a sum of consecutive naturals, for example, 664 + ... + 7353.

It is an arithmetic number, because the mean of its divisors is an integer number (2694048).

Almost surely, 2^26816865 is an apocalyptic number.

It is an amenable number.

26816865 is a deficient number, since it is larger than the sum of its proper divisors (16287903).

26816865 is a wasteful number, since it uses less digits than its factorization.

26816865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8248.

The product of its digits is 138240, while the sum is 42.

The square root of 26816865 is about 5178.5002655209. The cubic root of 26816865 is about 299.3201828815.

The spelling of 26816865 in words is "twenty-six million, eight hundred sixteen thousand, eight hundred sixty-five".