2556936 has 48 divisors (see below), whose sum is σ = 7335900. Its totient is φ = 801792.

The previous prime is 2556913. The next prime is 2556943. The reversal of 2556936 is 6396552.

It can be written as a sum of positive squares in 2 ways, for example, as 2232036 + 324900 = 1494^2 + 570^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2556936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180 + ... + 2268.

2^2556936 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 2556936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3667950).

2556936 is an abundant number, since it is smaller than the sum of its proper divisors (4778964).

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

2556936 is a wasteful number, since it uses less digits than its factorization.

2556936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2111 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 2556936 is about 1599.0422133265. The cubic root of 2556936 is about 136.7434772135.

The spelling of 2556936 in words is "two million, five hundred fifty-six thousand, nine hundred thirty-six".