28710689999 has 2 divisors, whose sum is σ = 28710690000. Its totient is φ = 28710689998.

The previous prime is 28710689983. The next prime is 28710690007. The reversal of 28710689999 is 99998601782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28710689999 - 2⁴ = 28710689983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28710689899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14355344999 + 14355345000.

It is an arithmetic number, because the mean of its divisors is an integer number (14355345000).

Almost surely, 2^28710689999 is an apocalyptic number.

28710689999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28710689999 is an equidigital number, since it uses as much as digits as its factorization.

28710689999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 68.

The spelling of 28710689999 in words is "twenty-eight billion, seven hundred ten million, six hundred eighty-nine thousand, nine hundred ninety-nine".