2636856 has 48 divisors (see below), whose sum is σ = 7286760. Its totient is φ = 861120.

The previous prime is 2636831. The next prime is 2636857. The reversal of 2636856 is 6586362.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 2636856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2636857) 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, 3471 + ... + 4161.

2^2636856 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 2636856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3643380).

2636856 is an abundant number, since it is smaller than the sum of its proper divisors (4649904).

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

2636856 is a wasteful number, since it uses less digits than its factorization.

2636856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 749 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2636856 is about 1623.8398935856. The cubic root of 2636856 is about 138.1535782339.

The spelling of 2636856 in words is "two million, six hundred thirty-six thousand, eight hundred fifty-six".