28107846857 has 4 divisors (see below), whose sum is σ = 28503732096. Its totient is φ = 27711961620.

The previous prime is 28107846829. The next prime is 28107846863. The reversal of 28107846857 is 75864870182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28107846857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28107846457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197942513 + ... + 197942654.

It is an arithmetic number, because the mean of its divisors is an integer number (7125933024).

Almost surely, 2^28107846857 is an apocalyptic number.

It is an amenable number.

28107846857 is a deficient number, since it is larger than the sum of its proper divisors (395885239).

28107846857 is an equidigital number, since it uses as much as digits as its factorization.

28107846857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395885238.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 28107846857 in words is "twenty-eight billion, one hundred seven million, eight hundred forty-six thousand, eight hundred fifty-seven".