2585856 has 144 divisors (see below), whose sum is σ = 8699264. Its totient is φ = 663552.

The previous prime is 2585839. The next prime is 2585899. The reversal of 2585856 is 6585852.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69870 + ... + 69906.

2^2585856 is an apocalyptic number.

2585856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2585856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4349632).

2585856 is an abundant number, since it is smaller than the sum of its proper divisors (6113408).

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

2585856 is a wasteful number, since it uses less digits than its factorization.

2585856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 62 counting only the distinct ones).

The product of its digits is 96000, while the sum is 39.

The square root of 2585856 is about 1608.0597003843. The cubic root of 2585856 is about 137.2570873676.

The spelling of 2585856 in words is "two million, five hundred eighty-five thousand, eight hundred fifty-six".