556826 has 4 divisors (see below), whose sum is σ = 835242. Its totient is φ = 278412.

The previous prime is 556823. The next prime is 556841. The reversal of 556826 is 628655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628655 = 5 ⋅125731.

It can be written as a sum of positive squares in only one way, i.e., 358801 + 198025 = 599^2 + 445^2 .

It is a junction number, because it is equal to n+sod(n) for n = 556792 and 556801.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556826.

It is not an unprimeable number, because it can be changed into a prime (556823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139205 + ... + 139208.

2⁵⁵⁶⁸²⁶ is an apocalyptic number.

556826 is a deficient number, since it is larger than the sum of its proper divisors (278416).

556826 is a wasteful number, since it uses less digits than its factorization.

556826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278415.

The product of its digits is 14400, while the sum is 32.

The square root of 556826 is about 746.2077458724. The cubic root of 556826 is about 82.2696851471.

The spelling of 556826 in words is "five hundred fifty-six thousand, eight hundred twenty-six".