40786 has 4 divisors (see below), whose sum is σ = 61182. Its totient is φ = 20392.

The previous prime is 40771. The next prime is 40787. The reversal of 40786 is 68704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34225 + 6561 = 185^2 + 81^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40786.

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

40786 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10195 + ... + 10198.

2⁴⁰⁷⁸⁶ is an apocalyptic number.

40786 is a deficient number, since it is larger than the sum of its proper divisors (20396).

40786 is a wasteful number, since it uses less digits than its factorization.

40786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20395.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40786 is about 201.9554406299. The cubic root of 40786 is about 34.4220743483.

The spelling of 40786 in words is "forty thousand, seven hundred eighty-six".