3991084 has 12 divisors (see below), whose sum is σ = 7036344. Its totient is φ = 1980704.

The previous prime is 3991051. The next prime is 3991087. The reversal of 3991084 is 4801993.

It is not an unprimeable number, because it can be changed into a prime (3991087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3094 + ... + 4189.

It is an arithmetic number, because the mean of its divisors is an integer number (586362).

Almost surely, 2^3991084 is an apocalyptic number.

It is an amenable number.

3991084 is a deficient number, since it is larger than the sum of its proper divisors (3045260).

3991084 is a wasteful number, since it uses less digits than its factorization.

3991084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424 (or 7422 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3991084 is about 1997.7697565035. The cubic root of 3991084 is about 158.6220735577.

The spelling of 3991084 in words is "three million, nine hundred ninety-one thousand, eighty-four".