2816991 has 16 divisors (see below), whose sum is σ = 4218720. Its totient is φ = 1857600.

The previous prime is 2816981. The next prime is 2817007. The reversal of 2816991 is 1996182.

It is not a de Polignac number, because 2816991 - 2⁶ = 2816927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2816941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (263670).

2^2816991 is an apocalyptic number.

2816991 is a deficient number, since it is larger than the sum of its proper divisors (1401729).

2816991 is a wasteful number, since it uses less digits than its factorization.

2816991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1137 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 2816991 is about 1678.3894065443. The cubic root of 2816991 is about 141.2304966937.

The spelling of 2816991 in words is "two million, eight hundred sixteen thousand, nine hundred ninety-one".