26889 has 4 divisors (see below), whose sum is σ = 35856. Its totient is φ = 17924.

The previous prime is 26881. The next prime is 26891. The reversal of 26889 is 98862.

Added to its reverse (98862) it gives a triangular number (125751 = T₅₀₁).

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 a cyclic number.

It is not a de Polignac number, because 26889 - 2³ = 26881 is a prime.

It is a D-number.

It is a plaindrome in base 10 and base 12.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (26881) 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, 4479 + ... + 4484.

It is an arithmetic number, because the mean of its divisors is an integer number (8964).

2²⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

26889 is a deficient number, since it is larger than the sum of its proper divisors (8967).

26889 is an equidigital number, since it uses as much as digits as its factorization.

26889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8966.

The product of its digits is 6912, while the sum is 33.

The square root of 26889 is about 163.9786571478. The cubic root of 26889 is about 29.9588324224.

Adding to 26889 its reverse (98862), we get a triangular number (125751 = T₅₀₁).

The spelling of 26889 in words is "twenty-six thousand, eight hundred eighty-nine".