40040543 has 8 divisors (see below), whose sum is σ = 42472320. Its totient is φ = 37641240.

The previous prime is 40040537. The next prime is 40040551. The reversal of 40040543 is 34504004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40040543 - 2¹⁸ = 39778399 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 (40040513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555 + ... + 10532.

It is an arithmetic number, because the mean of its divisors is an integer number (5309040).

Almost surely, 2^40040543 is an apocalyptic number.

40040543 is a deficient number, since it is larger than the sum of its proper divisors (2431777).

40040543 is a wasteful number, since it uses less digits than its factorization.

40040543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16237.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40040543 is about 6327.7597141484. The cubic root of 40040543 is about 342.1106962438.

Adding to 40040543 its reverse (34504004), we get a palindrome (74544547).

The spelling of 40040543 in words is "forty million, forty thousand, five hundred forty-three".