It is a happy number.
It is a congruent number.
It is a Kaprekar number, because its square (66616807495744) can be partitioned into two parts whose sum is 8161912.
Almost surely, 28161912 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 8161912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8420760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
8161912 is a wasteful number, since it uses less digits than its factorization.
8161912 is an evil number, because the sum of its binary digits is even.
The square root of 8161912 is about 2856.9060187553. The cubic root of 8161912 is about 201.3402650519.
The spelling of 8161912 in words is "eight million, one hundred sixty-one thousand, nine hundred twelve".