40385543 has 8 divisors (see below), whose sum is σ = 44204160. Its totient is φ = 36591480.

The previous prime is 40385519. The next prime is 40385551. The reversal of 40385543 is 34558304.

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 40385543 - 2¹² = 40381447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40385593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (5525520).

Almost surely, 2^40385543 is an apocalyptic number.

40385543 is a deficient number, since it is larger than the sum of its proper divisors (3818617).

40385543 is a wasteful number, since it uses less digits than its factorization.

40385543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12277.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 40385543 is about 6354.9620769915. The cubic root of 40385543 is about 343.0904599811.

It can be divided in two parts, 40 and 385543, that added together give a palindrome (385583).

The spelling of 40385543 in words is "forty million, three hundred eighty-five thousand, five hundred forty-three".