Adding to 30400 its reverse (403), we get a palindrome (30803).
It is a nialpdrome in base 8.
30400 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
230400 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 30400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39370).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30400 is a wasteful number, since it uses less digits than its factorization.
30400 is an odious number, because the sum of its binary digits is odd.
The square root of 30400 is about 174.3559577416. The cubic root of 30400 is about 31.2098150142.
The spelling of 30400 in words is "thirty thousand, four hundred".