2786256 has 60 divisors (see below), whose sum is σ = 8511360. Its totient is φ = 843840.

The previous prime is 2786221. The next prime is 2786257. The reversal of 2786256 is 6526872.

2786256 is a `hidden beast` number, since 27 + 8 + 625 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2¹² + 7⁷ + 8² + 6² + 2¹² + 5⁹ + 6⁴ .

It is a self number, because there is not a number n which added to its sum of digits gives 2786256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2786257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 705 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (141856).

2^2786256 is an apocalyptic number.

2786256 is the 1056-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2786256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4255680).

2786256 is an abundant number, since it is smaller than the sum of its proper divisors (5725104).

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

2786256 is a wasteful number, since it uses less digits than its factorization.

2786256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1775 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2786256 is about 1669.2081955227. The cubic root of 2786256 is about 140.7149818184.

It can be divided in two parts, 278625 and 6, that added together give a triangular number (278631 = T₇₄₆).

The spelling of 2786256 in words is "two million, seven hundred eighty-six thousand, two hundred fifty-six".