43991116 has 12 divisors (see below), whose sum is σ = 82906432. Its totient is φ = 20303568.

The previous prime is 43991093. The next prime is 43991117. The reversal of 43991116 is 61119934.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (43991117) 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 3 ways as a sum of consecutive naturals, for example, 422940 + ... + 423043.

Almost surely, 2^43991116 is an apocalyptic number.

It is an amenable number.

43991116 is a deficient number, since it is larger than the sum of its proper divisors (38915316).

43991116 is a wasteful number, since it uses less digits than its factorization.

43991116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846000 (or 845998 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 43991116 is about 6632.5798902086. The cubic root of 43991116 is about 353.0110716192.

The spelling of 43991116 in words is "forty-three million, nine hundred ninety-one thousand, one hundred sixteen".