It is a tau number, because it is divible by the number of its divisors (40).
It is a self number, because there is not a number n which added to its sum of digits gives 24720.
It is an unprimeable number.
24720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
224720 is an apocalyptic number.
24720 is a gapful number since it is divisible by the number (20) 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 24720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38688).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
24720 is a wasteful number, since it uses less digits than its factorization.
24720 is an evil number, because the sum of its binary digits is even.
The square root of 24720 is about 157.2259520563. The cubic root of 24720 is about 29.1306039552.
The spelling of 24720 in words is "twenty-four thousand, seven hundred twenty", and thus it is an iban number.