26640 is a `hidden beast` number, since 2 + 664 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (60).
It is a plaindrome in base 14.
It is a zygodrome in base 3 and base 14.
226640 is an apocalyptic number.
26640 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 26640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45942).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
26640 is a wasteful number, since it uses less digits than its factorization.
26640 is an evil number, because the sum of its binary digits is even.
The square root of 26640 is about 163.2176461048. The cubic root of 26640 is about 29.8660696451.
The spelling of 26640 in words is "twenty-six thousand, six hundred forty".