40985 has 8 divisors (see below), whose sum is σ = 56256.
Its totient is φ = 28080.
The previous prime is 40973. The next prime is 40993. The reversal of 40985 is 58904.
It can be divided in two parts, 409 and 85, that added together give a palindrome (494).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a de Polignac number, because none of the positive numbers 2k-40985 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 620.
It is an arithmetic number, because the mean of its divisors is an integer number (7032).
240985 is an apocalyptic number.
It is an amenable number.
40985 is a deficient number, since it is larger than the sum of its proper divisors (15271).
40985 is a wasteful number, since it uses less digits than its factorization.
40985 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1183.
The product of its (nonzero) digits is 1440, while the sum is 26.
The square root of 40985 is about 202.4475240649.
The cubic root of 40985 is about 34.4779667479.
The spelling of 40985 in words is "forty thousand, nine hundred eighty-five".