28608861979 has 2 divisors, whose sum is σ = 28608861980. Its totient is φ = 28608861978.

The previous prime is 28608861901. The next prime is 28608862013. The reversal of 28608861979 is 97916880682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28608861979 - 2¹³ = 28608853787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28608861979.

It is not a weakly prime, because it can be changed into another prime (28608862979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14304430989 + 14304430990.

It is an arithmetic number, because the mean of its divisors is an integer number (14304430990).

Almost surely, 2^28608861979 is an apocalyptic number.

28608861979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28608861979 is an equidigital number, since it uses as much as digits as its factorization.

28608861979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 28608861979 in words is "twenty-eight billion, six hundred eight million, eight hundred sixty-one thousand, nine hundred seventy-nine".