28705000039 has 2 divisors, whose sum is σ = 28705000040. Its totient is φ = 28705000038.

The previous prime is 28705000019. The next prime is 28705000057. The reversal of 28705000039 is 93000050782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28705000039 - 2²³ = 28696611431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28704999968 and 28705000013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28705000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14352500019 + 14352500020.

It is an arithmetic number, because the mean of its divisors is an integer number (14352500020).

Almost surely, 2^28705000039 is an apocalyptic number.

28705000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

28705000039 is an equidigital number, since it uses as much as digits as its factorization.

28705000039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 28705000039 in words is "twenty-eight billion, seven hundred five million, thirty-nine", and thus it is an aban number.