28706256679 has 2 divisors, whose sum is σ = 28706256680. Its totient is φ = 28706256678.

The previous prime is 28706256673. The next prime is 28706256697. The reversal of 28706256679 is 97665260782.

Together with next prime (28706256697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28706256679 - 2¹⁵ = 28706223911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28706256673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14353128339 + 14353128340.

It is an arithmetic number, because the mean of its divisors is an integer number (14353128340).

Almost surely, 2^28706256679 is an apocalyptic number.

28706256679 is a deficient number, since it is larger than the sum of its proper divisors (1).

28706256679 is an equidigital number, since it uses as much as digits as its factorization.

28706256679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 28706256679 in words is "twenty-eight billion, seven hundred six million, two hundred fifty-six thousand, six hundred seventy-nine".