28805850857 has 4 divisors (see below), whose sum is σ = 32920972416. Its totient is φ = 24690729300.

The previous prime is 28805850841. The next prime is 28805850859. The reversal of 28805850857 is 75805850882.

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 not a de Polignac number, because 28805850857 - 2⁴ = 28805850841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28805850859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057560769 + ... + 2057560782.

It is an arithmetic number, because the mean of its divisors is an integer number (8230243104).

Almost surely, 2^28805850857 is an apocalyptic number.

It is an amenable number.

28805850857 is a deficient number, since it is larger than the sum of its proper divisors (4115121559).

28805850857 is an equidigital number, since it uses as much as digits as its factorization.

28805850857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115121558.

The product of its (nonzero) digits is 7168000, while the sum is 56.

The spelling of 28805850857 in words is "twenty-eight billion, eight hundred five million, eight hundred fifty thousand, eight hundred fifty-seven".