26858 has 8 divisors (see below), whose sum is σ = 43428. Its totient is φ = 12384.

The previous prime is 26849. The next prime is 26861. The reversal of 26858 is 85862.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26569 + 289 = 163^2 + 17^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26858.

It is an unprimeable number.

26858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491 + ... + 542.

2²⁶⁸⁵⁸ is an apocalyptic number.

26858 is a deficient number, since it is larger than the sum of its proper divisors (16570).

26858 is a wasteful number, since it uses less digits than its factorization.

26858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048.

The product of its digits is 3840, while the sum is 29.

The square root of 26858 is about 163.8841053916. The cubic root of 26858 is about 29.9473149377.

The spelling of 26858 in words is "twenty-six thousand, eight hundred fifty-eight".