It is a Jordan-Polya number, since it can be written as 5! ⋅ (2!)12.
It is a tau number, because it is divible by the number of its divisors (64).
It is an ABA number since it can be written as A⋅BA, here for A=15, B=2.
It is a nialpdrome in base 2.
It is a zygodrome in base 2.
It is a congruent number.
491520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
In principle, a polygon with 491520 sides can be constructed with ruler and compass.
2491520 is an apocalyptic number.
491520 is a gapful number since it is divisible by the number (40) 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 491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786420).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
491520 is an frugal number, since it uses more digits than its factorization.
491520 is an evil number, because the sum of its binary digits is even.
The square root of 491520 is about 701.0848736066. The cubic root of 491520 is about 78.9187863786.
The spelling of 491520 in words is "four hundred ninety-one thousand, five hundred twenty".