40115783 has 4 divisors (see below), whose sum is σ = 42227160. Its totient is φ = 38004408.

The previous prime is 40115773. The next prime is 40115819. The reversal of 40115783 is 38751104.

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

It is not a de Polignac number, because 40115783 - 2⁸ = 40115527 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 (40115723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055660 + ... + 1055697.

It is an arithmetic number, because the mean of its divisors is an integer number (10556790).

Almost surely, 2^40115783 is an apocalyptic number.

40115783 is a deficient number, since it is larger than the sum of its proper divisors (2111377).

40115783 is a wasteful number, since it uses less digits than its factorization.

40115783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111376.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 40115783 is about 6333.7021559274. The cubic root of 40115783 is about 342.3248483738.

Adding to 40115783 its reverse (38751104), we get a palindrome (78866887).

The spelling of 40115783 in words is "forty million, one hundred fifteen thousand, seven hundred eighty-three".