798 has 16 divisors (see below), whose sum is σ = 1920. Its totient is φ = 216.

The previous prime is 797. The next prime is 809. The reversal of 798 is 897.

798 is nontrivially palindromic in base 11 and base 15.

It is an Ulam number.

798 is an undulating number in base 15.

It is a Curzon number.

798 is a nontrivial repdigit in base 11.

It is a plaindrome in base 11 and base 12.

It is a nialpdrome in base 7, base 11 and base 14.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797) 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, 33 + ... + 51.

It is an arithmetic number, because the mean of its divisors is an integer number (120).

It is a practical number, because each smaller number is the sum of distinct divisors of 798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960).

798 is an abundant number, since it is smaller than the sum of its proper divisors (1122).

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

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

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

The sum of its prime factors is 31.

The product of its digits is 504, while the sum is 24.

The square root of 798 is about 28.2488937837. The cubic root of 798 is about 9.2754352302.

Subtracting 798 from its reverse (897), we obtain a palindrome (99).

Multiplying 798 by its reverse (897), we get a triangular number (715806 = T₁₁₉₆).

It can be divided in two parts, 7 and 98, that multiplied together give a palindrome (686).

The spelling of 798 in words is "seven hundred ninety-eight", and thus it is an aban number and an oban number.