556404826 has 4 divisors (see below), whose sum is σ = 834607242. Its totient is φ = 278202412.

The previous prime is 556404811. The next prime is 556404829. The reversal of 556404826 is 628404655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628404655 = 5 ⋅125680931.

It can be written as a sum of positive squares in only one way, i.e., 499477801 + 56927025 = 22349^2 + 7545^2 .

It is not an unprimeable number, because it can be changed into a prime (556404829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139101205 + ... + 139101208.

Almost surely, 2^556404826 is an apocalyptic number.

556404826 is a deficient number, since it is larger than the sum of its proper divisors (278202416).

556404826 is a wasteful number, since it uses less digits than its factorization.

556404826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278202415.

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 556404826 is about 23588.2349064104. The cubic root of 556404826 is about 822.4893743758.

The spelling of 556404826 in words is "five hundred fifty-six million, four hundred four thousand, eight hundred twenty-six".