40091823 has 24 divisors (see below), whose sum is σ = 59515040. Its totient is φ = 25997760.

The previous prime is 40091813. The next prime is 40091827. The reversal of 40091823 is 32819004.

40091823 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 40091823 - 2⁵ = 40091791 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 (40091827) 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, 56193 + ... + 56901.

Almost surely, 2^40091823 is an apocalyptic number.

40091823 is a deficient number, since it is larger than the sum of its proper divisors (19423217).

40091823 is a wasteful number, since it uses less digits than its factorization.

40091823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 40091823 is about 6331.8104046157. The cubic root of 40091823 is about 342.2566812148.

It can be divided in two parts, 4009 and 1823, that added together give a cube (5832 = 18³).

The spelling of 40091823 in words is "forty million, ninety-one thousand, eight hundred twenty-three".