40839491 has 24 divisors (see below), whose sum is σ = 54886896. Its totient is φ = 29944320.

The previous prime is 40839433. The next prime is 40839497. The reversal of 40839491 is 19493804.

40839491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40839491 - 2¹⁸ = 40577347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40839497) 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 23 ways as a sum of consecutive naturals, for example, 6935 + ... + 11391.

It is an arithmetic number, because the mean of its divisors is an integer number (2286954).

Almost surely, 2^40839491 is an apocalyptic number.

40839491 is a deficient number, since it is larger than the sum of its proper divisors (14047405).

40839491 is a wasteful number, since it uses less digits than its factorization.

40839491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499 (or 4492 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 40839491 is about 6390.5782993404. The cubic root of 40839491 is about 344.3711600324.

The spelling of 40839491 in words is "forty million, eight hundred thirty-nine thousand, four hundred ninety-one".