26815 has 8 divisors (see below), whose sum is σ = 33408. Its totient is φ = 20640.

The previous prime is 26813. The next prime is 26821. The reversal of 26815 is 51862.

It is a happy number.

26815 is nontrivially palindromic in base 9.

26815 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 26815 - 2¹ = 26813 is a prime.

It is a Duffinian number.

26815 is strictly pandigital in base 6.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 241.

It is an arithmetic number, because the mean of its divisors is an integer number (4176).

2²⁶⁸¹⁵ is an apocalyptic number.

26815 is a deficient number, since it is larger than the sum of its proper divisors (6593).

26815 is a wasteful number, since it uses less digits than its factorization.

26815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209.

The product of its digits is 480, while the sum is 22.

The square root of 26815 is about 163.7528625704. The cubic root of 26815 is about 29.9313243901.

Subtracting from 26815 its product of digits (480), we obtain a triangular number (26335 = T₂₂₉).

It can be divided in two parts, 26 and 815, that added together give a square (841 = 29²).

The spelling of 26815 in words is "twenty-six thousand, eight hundred fifteen".