2557868 has 12 divisors (see below), whose sum is σ = 4516680. Its totient is φ = 1267392.

The previous prime is 2557861. The next prime is 2557879. The reversal of 2557868 is 8687552.

2557868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2557861) 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, 2378 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (376390).

2^2557868 is an apocalyptic number.

It is an amenable number.

2557868 is a deficient number, since it is larger than the sum of its proper divisors (1958812).

2557868 is a wasteful number, since it uses less digits than its factorization.

2557868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776 (or 5774 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 2557868 is about 1599.3336112269. Note that the first 3 decimals coincide. The cubic root of 2557868 is about 136.7600894712.

The spelling of 2557868 in words is "two million, five hundred fifty-seven thousand, eight hundred sixty-eight".