40000791 has 8 divisors (see below), whose sum is σ = 53603200. Its totient is φ = 26532792.

The previous prime is 40000769. The next prime is 40000799. The reversal of 40000791 is 19700004.

40000791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40000791 - 2⁵ = 40000759 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 (40000799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32905 + ... + 34098.

It is an arithmetic number, because the mean of its divisors is an integer number (6700400).

Almost surely, 2^40000791 is an apocalyptic number.

40000791 is a deficient number, since it is larger than the sum of its proper divisors (13602409).

40000791 is a wasteful number, since it uses less digits than its factorization.

40000791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67205.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 40000791 is about 6324.6178540683. The cubic root of 40000791 is about 341.9974436388.

Adding to 40000791 its reverse (19700004), we get a palindrome (59700795).

The spelling of 40000791 in words is "forty million, seven hundred ninety-one", and thus it is an aban number.