28809718079 has 2 divisors, whose sum is σ = 28809718080. Its totient is φ = 28809718078.

The previous prime is 28809718057. The next prime is 28809718087. The reversal of 28809718079 is 97081790882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28809718079 - 2²⁴ = 28792940863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28809718099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404859039 + 14404859040.

It is an arithmetic number, because the mean of its divisors is an integer number (14404859040).

Almost surely, 2^28809718079 is an apocalyptic number.

28809718079 is a deficient number, since it is larger than the sum of its proper divisors (1).

28809718079 is an equidigital number, since it uses as much as digits as its factorization.

28809718079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 59.

The spelling of 28809718079 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, seventy-nine".