3991112 has 16 divisors (see below), whose sum is σ = 7625340. Its totient is φ = 1957696.

The previous prime is 3991111. The next prime is 3991139. The reversal of 3991112 is 2111993.

3991112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3118756 + 872356 = 1766^2 + 934^2 .

It is not an unprimeable number, because it can be changed into a prime (3991111) 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, 4283 + ... + 5130.

Almost surely, 2^3991112 is an apocalyptic number.

It is an amenable number.

3991112 is a deficient number, since it is larger than the sum of its proper divisors (3634228).

3991112 is a wasteful number, since it uses less digits than its factorization.

3991112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9472 (or 9468 counting only the distinct ones).

The product of its digits is 486, while the sum is 26.

The square root of 3991112 is about 1997.7767643058. The cubic root of 3991112 is about 158.6224445018.

The spelling of 3991112 in words is "three million, nine hundred ninety-one thousand, one hundred twelve".