28086139177 has 4 divisors (see below), whose sum is σ = 28424526480. Its totient is φ = 27747751876.

The previous prime is 28086139157. The next prime is 28086139183. The reversal of 28086139177 is 77193168082.

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-28086139177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28086139157) 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, 169193527 + ... + 169193692.

It is an arithmetic number, because the mean of its divisors is an integer number (7106131620).

Almost surely, 2^28086139177 is an apocalyptic number.

It is an amenable number.

28086139177 is a deficient number, since it is larger than the sum of its proper divisors (338387303).

28086139177 is an equidigital number, since it uses as much as digits as its factorization.

28086139177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338387302.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 28086139177 in words is "twenty-eight billion, eighty-six million, one hundred thirty-nine thousand, one hundred seventy-seven".