26389 has 4 divisors (see below), whose sum is σ = 28800. Its totient is φ = 23980.

The previous prime is 26387. The next prime is 26393. The reversal of 26389 is 98362.

26389 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26389 - 2¹ = 26387 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 (26387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189 + ... + 1210.

It is an arithmetic number, because the mean of its divisors is an integer number (7200).

2²⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

26389 is a deficient number, since it is larger than the sum of its proper divisors (2411).

26389 is a wasteful number, since it uses less digits than its factorization.

26389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410.

The product of its digits is 2592, while the sum is 28.

The square root of 26389 is about 162.4469144059. The cubic root of 26389 is about 29.7719749136.

The spelling of 26389 in words is "twenty-six thousand, three hundred eighty-nine".