28316779 has 2 divisors, whose sum is σ = 28316780. Its totient is φ = 28316778.

The previous prime is 28316711. The next prime is 28316807. The reversal of 28316779 is 97761382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28316779 - 2²³ = 19928171 is a prime.

It is not a weakly prime, because it can be changed into another prime (28316279) 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 as a sum of consecutive naturals, namely, 14158389 + 14158390.

It is an arithmetic number, because the mean of its divisors is an integer number (14158390).

Almost surely, 2^28316779 is an apocalyptic number.

28316779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28316779 is an equidigital number, since it uses as much as digits as its factorization.

28316779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 28316779 is about 5321.3512381725. The cubic root of 28316779 is about 304.7997574817.

The spelling of 28316779 in words is "twenty-eight million, three hundred sixteen thousand, seven hundred seventy-nine".