Adding to 84000 its reverse (48), we get a palindrome (84048).
It is a tau number, because it is divible by the number of its divisors (96).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84000.
It is an unprimeable number.
284000 is an apocalyptic number.
84000 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 84000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157248).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
84000 is a wasteful number, since it uses less digits than its factorization.
84000 is an evil number, because the sum of its binary digits is even.
The square root of 84000 is about 289.8275349238. The cubic root of 84000 is about 43.7951913989.
The spelling of 84000 in words is "eighty-four thousand".