It is a happy number.
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 5 and base 10.
It is a congruent number.
27000 is an apocalyptic number.
7000 is a gapful number since it is divisible by the number (70) 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 7000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
7000 is a wasteful number, since it uses less digits than its factorization.
7000 is an odious number, because the sum of its binary digits is odd.
The square root of 7000 is about 83.6660026534. Note that the first 3 decimals coincide. The cubic root of 7000 is about 19.1293118277.
The spelling of 7000 in words is "seven thousand", and thus it is an iban number.