Subtracting from 14640 its reverse (4641), we obtain a palindrome (9999).
14640 is nontrivially palindromic in base 11.
It is a tau number, because it is divible by the number of its divisors (40).
14640 is a nontrivial repdigit in base 11.
It is a plaindrome in base 11.
It is a nialpdrome in base 11.
It is a zygodrome in base 11.
It is a congruent number.
It is an unprimeable number.
214640 is an apocalyptic number.
14640 is a gapful number since it is divisible by the number (10) 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 14640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23064).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
14640 is a wasteful number, since it uses less digits than its factorization.
14640 is an evil number, because the sum of its binary digits is even.
The square root of 14640 is about 120.9958676980. The cubic root of 14640 is about 24.4632240139.
The spelling of 14640 in words is "fourteen thousand, six hundred forty".