It is a tau number, because it is divible by the number of its divisors (20).
It is a Leyland number of the form 122 + 212.
It is a d-powerful number, because it can be written as 42 + 46 + 27 + 0 .
It is a plaindrome in base 14.
It is a congruent number.
24240 is an apocalyptic number.
4240 is a gapful number since it is divisible by the number (40) 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 4240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5022).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
4240 is a wasteful number, since it uses less digits than its factorization.
4240 is an odious number, because the sum of its binary digits is odd.
The square root of 4240 is about 65.1152823844. The cubic root of 4240 is about 16.1853446691.
4240 divided by its sum of digits (10) gives a palindrome (424).
Adding to 4240 its reverse (424), we get a palindrome (4664).
The spelling of 4240 in words is "four thousand, two hundred forty", and thus it is an iban number.