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.
It is an unprimeable number.
250000 is an apocalyptic number.
50000 is a gapful number since it is divisible by the number (50) 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 50000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60543).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
50000 is an frugal number, since it uses more digits than its factorization.
50000 is an evil number, because the sum of its binary digits is even.
The square root of 50000 is about 223.6067977500. The cubic root of 50000 is about 36.8403149864.
The spelling of 50000 in words is "fifty thousand", and thus it is an eban number.