27798 has 16 divisors (see below), whose sum is σ = 57456. Its totient is φ = 8960.

The previous prime is 27793. The next prime is 27799. The reversal of 27798 is 89772.

27798 is an undulating number in base 15.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190 + ... + 302.

It is an arithmetic number, because the mean of its divisors is an integer number (3591).

2²⁷⁷⁹⁸ is an apocalyptic number.

27798 is an abundant number, since it is smaller than the sum of its proper divisors (29658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28728).

27798 is a wasteful number, since it uses less digits than its factorization.

27798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 7056, while the sum is 33.

The square root of 27798 is about 166.7273222960. The cubic root of 27798 is about 30.2926906745.

The spelling of 27798 in words is "twenty-seven thousand, seven hundred ninety-eight".