It is a happy number.
It is a tau number, because it is divible by the number of its divisors (128).
It is a nialpdrome in base 2.
It is a zygodrome in base 2.
It is a congruent number.
It is an unprimeable number.
In principle, a polygon with 8355840 sides can be constructed with ruler and compass.
Almost surely, 28355840 is an apocalyptic number.
8355840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 8355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14155560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
8355840 is an equidigital number, since it uses as much as digits as its factorization.
8355840 is an evil number, because the sum of its binary digits is even.
The square root of 8355840 is about 2890.6469864029. The cubic root of 8355840 is about 202.9224225723.
The spelling of 8355840 in words is "eight million, three hundred fifty-five thousand, eight hundred forty".