It is a happy number.
It is a nialpdrome in base 7.
It is a zygodrome in base 7.
It is a congruent number.
It is an unprimeable number.
2115640 is an apocalyptic number.
115640 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 115640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153900).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
115640 is a wasteful number, since it uses less digits than its factorization.
115640 is an odious number, because the sum of its binary digits is odd.
The square root of 115640 is about 340.0588184418. The cubic root of 115640 is about 48.7194856157.
The spelling of 115640 in words is "one hundred fifteen thousand, six hundred forty".