28616579 has 2 divisors, whose sum is σ = 28616580. Its totient is φ = 28616578.

The previous prime is 28616573. The next prime is 28616587. The reversal of 28616579 is 97561682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28616579 - 2²⁴ = 11839363 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28616573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14308289 + 14308290.

It is an arithmetic number, because the mean of its divisors is an integer number (14308290).

Almost surely, 2^28616579 is an apocalyptic number.

28616579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28616579 is an equidigital number, since it uses as much as digits as its factorization.

28616579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 28616579 is about 5349.4466068931. The cubic root of 28616579 is about 305.8716586258.

The spelling of 28616579 in words is "twenty-eight million, six hundred sixteen thousand, five hundred seventy-nine".