26864567 has 4 divisors (see below), whose sum is σ = 26884440. Its totient is φ = 26844696.

The previous prime is 26864557. The next prime is 26864599. The reversal of 26864567 is 76546862.

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

It is a cyclic number.

It is not a de Polignac number, because 26864567 - 2¹⁴ = 26848183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26864557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7748 + ... + 10665.

It is an arithmetic number, because the mean of its divisors is an integer number (6721110).

Almost surely, 2^26864567 is an apocalyptic number.

26864567 is a deficient number, since it is larger than the sum of its proper divisors (19873).

26864567 is a wasteful number, since it uses less digits than its factorization.

26864567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872.

The product of its digits is 483840, while the sum is 44.

The square root of 26864567 is about 5183.1039927827. The cubic root of 26864567 is about 299.4975552637.

The spelling of 26864567 in words is "twenty-six million, eight hundred sixty-four thousand, five hundred sixty-seven".