2605856 has 36 divisors (see below), whose sum is σ = 5647446. Its totient is φ = 1182720.

The previous prime is 2605849. The next prime is 2605871. The reversal of 2605856 is 6585062.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 234256 = 1540^2 + 484^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3536 + ... + 4208.

2^2605856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2605856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2823723).

2605856 is an abundant number, since it is smaller than the sum of its proper divisors (3041590).

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

2605856 is a wasteful number, since it uses less digits than its factorization.

2605856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2605856 is about 1614.2663968503. The cubic root of 2605856 is about 137.6100452374.

It can be divided in two parts, 260 and 5856, that added together give a palindrome (6116).

The spelling of 2605856 in words is "two million, six hundred five thousand, eight hundred fifty-six".