40242728943 has 12 divisors (see below), whose sum is σ = 58203985840. Its totient is φ = 26793593856.

The previous prime is 40242728927. The next prime is 40242728963. The reversal of 40242728943 is 34982724204.

It is a happy number.

It is not a de Polignac number, because 40242728943 - 2⁴ = 40242728927 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 (40242728963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2900371 + ... + 2914212.

Almost surely, 2^40242728943 is an apocalyptic number.

40242728943 is a deficient number, since it is larger than the sum of its proper divisors (17961256897).

40242728943 is a wasteful number, since it uses less digits than its factorization.

40242728943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815358 (or 5815355 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 40242728943 in words is "forty billion, two hundred forty-two million, seven hundred twenty-eight thousand, nine hundred forty-three".