It is a Curzon number.
It is a nialpdrome in base 9.
It is an unprimeable number.
240986 is an apocalyptic number.
40986 is a gapful number since it is divisible by the number (46) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 40986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52272).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40986 is a wasteful number, since it uses less digits than its factorization.
40986 is an odious number, because the sum of its binary digits is odd.
The square root of 40986 is about 202.4499938256. The cubic root of 40986 is about 34.4782471569.
The spelling of 40986 in words is "forty thousand, nine hundred eighty-six".