26890 has 8 divisors (see below), whose sum is σ = 48420. Its totient is φ = 10752.

The previous prime is 26881. The next prime is 26891. The reversal of 26890 is 9862.

It can be written as a sum of positive squares in 2 ways, for example, as 23409 + 3481 = 153^2 + 59^2 .

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

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891) 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, 1335 + ... + 1354.

2²⁶⁸⁹⁰ is an apocalyptic number.

26890 is a deficient number, since it is larger than the sum of its proper divisors (21530).

26890 is a wasteful number, since it uses less digits than its factorization.

26890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 26890 is about 163.9817062968. The cubic root of 26890 is about 29.9592038068.

The spelling of 26890 in words is "twenty-six thousand, eight hundred ninety".