2556436 has 24 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 1227072.

The previous prime is 2556419. The next prime is 2556451. The reversal of 2556436 is 6346552.

It is a junction number, because it is equal to n+sod(n) for n = 2556398 and 2556407.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15225 + ... + 15391.

It is an arithmetic number, because the mean of its divisors is an integer number (194040).

2^2556436 is an apocalyptic number.

It is an amenable number.

2556436 is a deficient number, since it is larger than the sum of its proper divisors (2100524).

2556436 is a wasteful number, since it uses less digits than its factorization.

2556436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 301 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 2556436 is about 1598.8858620927. The cubic root of 2556436 is about 136.7345633943.

It can be divided in two parts, 25564 and 36, that added together give a square (25600 = 160²).

The spelling of 2556436 in words is "two million, five hundred fifty-six thousand, four hundred thirty-six".