28887112057 has 4 divisors (see below), whose sum is σ = 28948969296. Its totient is φ = 28825254820.

The previous prime is 28887111991. The next prime is 28887112087. The reversal of 28887112057 is 75021178882.

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 28887112057 - 2¹⁵ = 28887079289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28887112057.

It is not an unprimeable number, because it can be changed into a prime (28887112087) 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, 30927919 + ... + 30928852.

It is an arithmetic number, because the mean of its divisors is an integer number (7237242324).

Almost surely, 2^28887112057 is an apocalyptic number.

It is an amenable number.

28887112057 is a deficient number, since it is larger than the sum of its proper divisors (61857239).

28887112057 is an equidigital number, since it uses as much as digits as its factorization.

28887112057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61857238.

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 28887112057 in words is "twenty-eight billion, eight hundred eighty-seven million, one hundred twelve thousand, fifty-seven".