Adding to 1440 its reverse (441), we get a palindrome (1881).
Subtracting from 1440 its reverse (441), we obtain a palindrome (999).
It is a Jordan-Polya number, since it can be written as 6! ⋅ 2!.
It is a tau number, because it is divible by the number of its divisors (36).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 12 and base 15.
It is a zygodrome in base 4.
1440 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 1440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2457).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1440 is a wasteful number, since it uses less digits than its factorization.
1440 is an evil number, because the sum of its binary digits is even.
The square root of 1440 is about 37.9473319220. The cubic root of 1440 is about 11.2924323466.
The spelling of 1440 in words is "one thousand, four hundred forty", and thus it is an iban number.