40005743 has 4 divisors (see below), whose sum is σ = 42359040. Its totient is φ = 37652448.

The previous prime is 40005739. The next prime is 40005803. The reversal of 40005743 is 34750004.

40005743 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 40005743 - 2² = 40005739 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 (40005733) 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, 1176623 + ... + 1176656.

It is an arithmetic number, because the mean of its divisors is an integer number (10589760).

Almost surely, 2^40005743 is an apocalyptic number.

40005743 is a deficient number, since it is larger than the sum of its proper divisors (2353297).

40005743 is a wasteful number, since it uses less digits than its factorization.

40005743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353296.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40005743 is about 6325.0093280564. The cubic root of 40005743 is about 342.0115558719.

Adding to 40005743 its reverse (34750004), we get a palindrome (74755747).

The spelling of 40005743 in words is "forty million, five thousand, seven hundred forty-three".