2857868 has 12 divisors (see below), whose sum is σ = 5386080. Its totient is φ = 1318992.

The previous prime is 2857867. The next prime is 2857889. The reversal of 2857868 is 8687582.

It is not an unprimeable number, because it can be changed into a prime (2857861) 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, 27428 + ... + 27531.

It is an arithmetic number, because the mean of its divisors is an integer number (448840).

2^2857868 is an apocalyptic number.

It is an amenable number.

2857868 is a deficient number, since it is larger than the sum of its proper divisors (2528212).

2857868 is a wasteful number, since it uses less digits than its factorization.

2857868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54976 (or 54974 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 2857868 is about 1690.5229959986. The cubic root of 2857868 is about 141.9103447813.

The spelling of 2857868 in words is "two million, eight hundred fifty-seven thousand, eight hundred sixty-eight".