It is a tau number, because it is divible by the number of its divisors (32).
It is an Ulam number.
It is a congruent number.
It is an unprimeable number.
In principle, a polygon with 8421376 sides can be constructed with ruler and compass.
Almost surely, 28421376 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 8421376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8454015).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
8421376 is an frugal number, since it uses more digits than its factorization.
8421376 is an evil number, because the sum of its binary digits is even.
The square root of 8421376 is about 2901.9607164812. The cubic root of 8421376 is about 203.4515577515.
The spelling of 8421376 in words is "eight million, four hundred twenty-one thousand, three hundred seventy-six".