40783 has 4 divisors (see below), whose sum is σ = 43200. Its totient is φ = 38368.

The previous prime is 40771. The next prime is 40787. The reversal of 40783 is 38704.

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

It is a cyclic number.

It is not a de Polignac number, because 40783 - 2⁵ = 40751 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

2⁴⁰⁷⁸³ is an apocalyptic number.

40783 is a deficient number, since it is larger than the sum of its proper divisors (2417).

40783 is a wasteful number, since it uses less digits than its factorization.

40783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40783 is about 201.9480131123. The cubic root of 40783 is about 34.4212303597.

The spelling of 40783 in words is "forty thousand, seven hundred eighty-three".