2568891 has 16 divisors (see below), whose sum is σ = 3718400. Its totient is φ = 1568160.

The previous prime is 2568871. The next prime is 2568901. The reversal of 2568891 is 1988652.

It is not a de Polignac number, because 2568891 - 2⁶ = 2568827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7596 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (232400).

2^2568891 is an apocalyptic number.

2568891 is a deficient number, since it is larger than the sum of its proper divisors (1149509).

2568891 is a wasteful number, since it uses less digits than its factorization.

2568891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its digits is 34560, while the sum is 39.

The square root of 2568891 is about 1602.7760292692. The cubic root of 2568891 is about 136.9562614562.

The spelling of 2568891 in words is "two million, five hundred sixty-eight thousand, eight hundred ninety-one".