40240443 has 16 divisors (see below), whose sum is σ = 54394112. Its totient is φ = 26460000.

The previous prime is 40240441. The next prime is 40240451. The reversal of 40240443 is 34404204.

It is not a de Polignac number, because 40240443 - 2¹ = 40240441 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40240441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95373 + ... + 95793.

It is an arithmetic number, because the mean of its divisors is an integer number (3399632).

Almost surely, 2^40240443 is an apocalyptic number.

40240443 is a deficient number, since it is larger than the sum of its proper divisors (14153669).

40240443 is a wasteful number, since it uses less digits than its factorization.

40240443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40240443 is about 6343.5355283942. The cubic root of 40240443 is about 342.6790737776.

Adding to 40240443 its reverse (34404204), we get a palindrome (74644647).

The spelling of 40240443 in words is "forty million, two hundred forty thousand, four hundred forty-three".