40000443 has 16 divisors (see below), whose sum is σ = 61057536. Its totient is φ = 22818240.

The previous prime is 40000421. The next prime is 40000451. The reversal of 40000443 is 34400004.

It is not a de Polignac number, because 40000443 - 2⁹ = 39999931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40000463) 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, 14730 + ... + 17232.

It is an arithmetic number, because the mean of its divisors is an integer number (3816096).

Almost surely, 2^40000443 is an apocalyptic number.

40000443 is a deficient number, since it is larger than the sum of its proper divisors (21057093).

40000443 is a wasteful number, since it uses less digits than its factorization.

40000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40000443 is about 6324.5903424649. The cubic root of 40000443 is about 341.9964518629.

Adding to 40000443 its reverse (34400004), we get a palindrome (74400447).

The spelling of 40000443 in words is "forty million, four hundred forty-three", and thus it is an aban number.