It is a tau number, because it is divible by the number of its divisors (60).
It is a zygodrome in base 2.
It is a congruent number.
30780 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
230780 is an apocalyptic number.
30780 is a gapful number since it is divisible by the number (30) 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 30780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30780 is a wasteful number, since it uses less digits than its factorization.
30780 is an evil number, because the sum of its binary digits is even.
The square root of 30780 is about 175.4422982066. The cubic root of 30780 is about 31.3393178047.
The spelling of 30780 in words is "thirty thousand, seven hundred eighty".