40387543 has 4 divisors (see below), whose sum is σ = 46157200. Its totient is φ = 34617888.

The previous prime is 40387541. The next prime is 40387547. The reversal of 40387543 is 34578304.

It is a happy number.

40387543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40387543 - 2¹ = 40387541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40387499 and 40387508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387541) 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 3 ways as a sum of consecutive naturals, for example, 2884818 + ... + 2884831.

It is an arithmetic number, because the mean of its divisors is an integer number (11539300).

Almost surely, 2^40387543 is an apocalyptic number.

40387543 is a deficient number, since it is larger than the sum of its proper divisors (5769657).

40387543 is an equidigital number, since it uses as much as digits as its factorization.

40387543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769656.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 40387543 is about 6355.1194323946. The cubic root of 40387543 is about 343.0961234730.

The spelling of 40387543 in words is "forty million, three hundred eighty-seven thousand, five hundred forty-three".