Adding to 8400 its reverse (48), we get a palindrome (8448).
It is a tau number, because it is divible by the number of its divisors (60).
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 7 and 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 8400.
It is an unprimeable number.
28400 is an apocalyptic number.
8400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.
8400 is the 75-th pentagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 8400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15376).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
8400 is a wasteful number, since it uses less digits than its factorization.
8400 is an evil number, because the sum of its binary digits is even.
The square root of 8400 is about 91.6515138991. The cubic root of 8400 is about 20.3279271363.
The spelling of 8400 in words is "eight thousand, four hundred".