Adding to 83520 its sum of digits (18), we get a palindrome (83538).
It is a congruent number.
It is an unprimeable number.
83520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
283520 is an apocalyptic number.
83520 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 83520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148590).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
83520 is a wasteful number, since it uses less digits than its factorization.
83520 is an odious number, because the sum of its binary digits is odd.
The square root of 83520 is about 288.9982698910. The cubic root of 83520 is about 43.7116125862.
The spelling of 83520 in words is "eighty-three thousand, five hundred twenty".