40857823 has 4 divisors (see below), whose sum is σ = 40873000. Its totient is φ = 40842648.

The previous prime is 40857811. The next prime is 40857827. The reversal of 40857823 is 32875804.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40857823 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 (40857827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (10218250).

Almost surely, 2^40857823 is an apocalyptic number.

40857823 is a deficient number, since it is larger than the sum of its proper divisors (15177).

40857823 is a wasteful number, since it uses less digits than its factorization.

40857823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15176.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 40857823 is about 6392.0124374097. The cubic root of 40857823 is about 344.4226793470.

The spelling of 40857823 in words is "forty million, eight hundred fifty-seven thousand, eight hundred twenty-three".