556328979 has 20 divisors (see below), whose sum is σ = 834537000. Its totient is φ = 369334080.

The previous prime is 556328951. The next prime is 556329001. The reversal of 556328979 is 979823655.

556328979 is a `hidden beast` number, since 5 + 563 + 2 + 8 + 9 + 79 = 666.

It is not a de Polignac number, because 556328979 - 2¹⁷ = 556197907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556320979) 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 in 19 ways as a sum of consecutive naturals, for example, 5272 + ... + 33770.

It is an arithmetic number, because the mean of its divisors is an integer number (41726850).

Almost surely, 2^556328979 is an apocalyptic number.

556328979 is a deficient number, since it is larger than the sum of its proper divisors (278208021).

556328979 is a wasteful number, since it uses less digits than its factorization.

556328979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28752 (or 28743 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 556328979 is about 23586.6271221639. The cubic root of 556328979 is about 822.4519997980.

The spelling of 556328979 in words is "five hundred fifty-six million, three hundred twenty-eight thousand, nine hundred seventy-nine".