28516779 has 12 divisors (see below), whose sum is σ = 42716856. Its totient is φ = 19011024.

The previous prime is 28516759. The next prime is 28516781. The reversal of 28516779 is 97761582.

It is not a de Polignac number, because 28516779 - 2¹² = 28512683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28516759) 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 in 11 ways as a sum of consecutive naturals, for example, 58434 + ... + 58919.

It is an arithmetic number, because the mean of its divisors is an integer number (3559738).

Almost surely, 2^28516779 is an apocalyptic number.

28516779 is a deficient number, since it is larger than the sum of its proper divisors (14200077).

28516779 is an equidigital number, since it uses as much as digits as its factorization.

28516779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117368 (or 117356 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28516779 is about 5340.1103921174. The cubic root of 28516779 is about 305.5156698032.

The spelling of 28516779 in words is "twenty-eight million, five hundred sixteen thousand, seven hundred seventy-nine".