40785 has 8 divisors (see below), whose sum is σ = 65280. Its totient is φ = 21744.

The previous prime is 40771. The next prime is 40787. The reversal of 40785 is 58704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40785 - 2⁸ = 40529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 1374.

It is an arithmetic number, because the mean of its divisors is an integer number (8160).

2⁴⁰⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

40785 is a deficient number, since it is larger than the sum of its proper divisors (24495).

40785 is a wasteful number, since it uses less digits than its factorization.

40785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 40785 is about 201.9529648210. The cubic root of 40785 is about 34.4217930233.

Adding to 40785 its product of nonzero digits (1120), we get a triangular number (41905 = T₂₈₉).

The spelling of 40785 in words is "forty thousand, seven hundred eighty-five".