2560866 has 64 divisors (see below), whose sum is σ = 6690816. Its totient is φ = 633600.

The previous prime is 2560849. The next prime is 2560871. The reversal of 2560866 is 6680652.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10506 + ... + 10746.

It is an arithmetic number, because the mean of its divisors is an integer number (104544).

2^2560866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2560866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3345408).

2560866 is an abundant number, since it is smaller than the sum of its proper divisors (4129950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2560866 is a wasteful number, since it uses less digits than its factorization.

2560866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2560866 is about 1600.2706021170. The cubic root of 2560866 is about 136.8134994031.

The spelling of 2560866 in words is "two million, five hundred sixty thousand, eight hundred sixty-six".