27398 has 16 divisors (see below), whose sum is σ = 49920. Its totient is φ = 11016.

The previous prime is 27397. The next prime is 27407. The reversal of 27398 is 89372.

It is a self number, because there is not a number n which added to its sum of digits gives 27398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215 + ... + 317.

It is an arithmetic number, because the mean of its divisors is an integer number (3120).

2²⁷³⁹⁸ is an apocalyptic number.

27398 is a deficient number, since it is larger than the sum of its proper divisors (22522).

27398 is a wasteful number, since it uses less digits than its factorization.

27398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131.

The product of its digits is 3024, while the sum is 29.

The square root of 27398 is about 165.5234122413. The cubic root of 27398 is about 30.1466889831.

It can be divided in two parts, 2739 and 8, that multiplied together give a palindrome (21912).

The spelling of 27398 in words is "twenty-seven thousand, three hundred ninety-eight".