2991868 has 24 divisors (see below), whose sum is σ = 5778864. Its totient is φ = 1344000.

The previous prime is 2991853. The next prime is 2991871. The reversal of 2991868 is 8681992.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3918 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (240786).

2^2991868 is an apocalyptic number.

It is an amenable number.

2991868 is a deficient number, since it is larger than the sum of its proper divisors (2786996).

2991868 is a wasteful number, since it uses less digits than its factorization.

2991868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 811 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 2991868 is about 1729.7017083879. The cubic root of 2991868 is about 144.0945238448.

The spelling of 2991868 in words is "two million, nine hundred ninety-one thousand, eight hundred sixty-eight".