1098 is nontrivially palindromic in base 8, base 11 and base 13.
It is an alternating number because its digits alternate between odd and even.
1098 is an undulating number in base 11.
1098 is a nontrivial repdigit in base 13.
It is a plaindrome in base 13 and base 16.
It is a nialpdrome in base 12 and base 13.
It is a zygodrome in base 13.
It is a self number, because there is not a number n which added to its sum of digits gives 1098.
1098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1098 is a wasteful number, since it uses less digits than its factorization.
1098 is an evil number, because the sum of its binary digits is even.
The square root of 1098 is about 33.1360830516. The cubic root of 1098 is about 10.3165411159.
Adding to 1098 its reverse (8901), we get a palindrome (9999).
The spelling of 1098 in words is "one thousand, ninety-eight".