26398 has 8 divisors (see below), whose sum is σ = 40392. Its totient is φ = 12936.

The previous prime is 26393. The next prime is 26399. The reversal of 26398 is 89362.

26398 is nontrivially palindromic in base 8.

26398 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

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

It is an Ulam number.

26398 is an undulating number in base 14.

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 (26393) 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, 36 + ... + 232.

It is an arithmetic number, because the mean of its divisors is an integer number (5049).

2²⁶³⁹⁸ is an apocalyptic number.

26398 is a deficient number, since it is larger than the sum of its proper divisors (13994).

26398 is a wasteful number, since it uses less digits than its factorization.

26398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266.

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

The square root of 26398 is about 162.4746134016. The cubic root of 26398 is about 29.7753591181.

It can be divided in two parts, 2639 and 8, that multiplied together give a palindrome (21112).

The spelling of 26398 in words is "twenty-six thousand, three hundred ninety-eight".