2656836 has 72 divisors (see below), whose sum is σ = 8275904. Its totient is φ = 699840.

The previous prime is 2656831. The next prime is 2656847. The reversal of 2656836 is 6386562.

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 2¹⁹ + 6² + 5³ + 6⁵ + 8⁷ + 3⁹ + 6⁵ .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 2656836.

It is not an unprimeable number, because it can be changed into a prime (2656831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2871 + ... + 3681.

2^2656836 is an apocalyptic number.

2656836 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 2656836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4137952).

2656836 is an abundant number, since it is smaller than the sum of its proper divisors (5619068).

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

2656836 is a wasteful number, since it uses less digits than its factorization.

2656836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 836 counting only the distinct ones).

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

The square root of 2656836 is about 1629.9803679799. The cubic root of 2656836 is about 138.5016399516.

Subtracting from 2656836 its product of digits (51840), we obtain a square (2604996 = 1614²).

The spelling of 2656836 in words is "two million, six hundred fifty-six thousand, eight hundred thirty-six".