26856005 has 16 divisors (see below), whose sum is σ = 37226304. Its totient is φ = 18382080.

The previous prime is 26855993. The next prime is 26856007. The reversal of 26856005 is 50065862.

26856005 = T₁₇₆₉ + T₁₇₇₀ + ... + T₁₇₈₅.

It is a happy number.

It is not a de Polignac number, because 26856005 - 2⁸ = 26855749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26856007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13427 + ... + 15296.

It is an arithmetic number, because the mean of its divisors is an integer number (2326644).

Almost surely, 2^26856005 is an apocalyptic number.

It is an amenable number.

26856005 is a deficient number, since it is larger than the sum of its proper divisors (10370299).

26856005 is a wasteful number, since it uses less digits than its factorization.

26856005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28756.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 26856005 is about 5182.2779740188. The cubic root of 26856005 is about 299.4657342838.

The spelling of 26856005 in words is "twenty-six million, eight hundred fifty-six thousand, five".