28705000019 has 2 divisors, whose sum is σ = 28705000020. Its totient is φ = 28705000018.

The previous prime is 28704999943. The next prime is 28705000039. The reversal of 28705000019 is 91000050782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28705000019 - 2²⁰ = 28703951443 is a prime.

It is a super-2 number, since 2×28705000019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28705000039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14352500009 + 14352500010.

It is an arithmetic number, because the mean of its divisors is an integer number (14352500010).

Almost surely, 2^28705000019 is an apocalyptic number.

28705000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28705000019 is an equidigital number, since it uses as much as digits as its factorization.

28705000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 28705000019 in words is "twenty-eight billion, seven hundred five million, nineteen", and thus it is an aban number.