28806779 has 2 divisors, whose sum is σ = 28806780. Its totient is φ = 28806778.

The previous prime is 28806761. The next prime is 28806821. The reversal of 28806779 is 97760882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28806779 - 2⁸ = 28806523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28806079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403389 + 14403390.

It is an arithmetic number, because the mean of its divisors is an integer number (14403390).

Almost surely, 2^28806779 is an apocalyptic number.

28806779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28806779 is an equidigital number, since it uses as much as digits as its factorization.

28806779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 28806779 is about 5367.1947048714. The cubic root of 28806779 is about 306.5478211246.

The spelling of 28806779 in words is "twenty-eight million, eight hundred six thousand, seven hundred seventy-nine".