Adding to 161838 its reverse (838161), we get a palindrome (999999).
161838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
161838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2161838 is an apocalyptic number.
161838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 161838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161838 is an frugal number, since it uses more digits than its factorization.
161838 is an odious number, because the sum of its binary digits is odd.
The square root of 161838 is about 402.2909394953. The cubic root of 161838 is about 54.4954405186.
The spelling of 161838 in words is "one hundred sixty-one thousand, eight hundred thirty-eight".