28877087317 has 4 divisors (see below), whose sum is σ = 31098401740. Its totient is φ = 26655772896.

The previous prime is 28877087279. The next prime is 28877087321. The reversal of 28877087317 is 71378077882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3368525521 + 25508561796 = 58039^2 + 159714^2 .

It is a cyclic number.

It is not a de Polignac number, because 28877087317 - 2²³ = 28868698709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877087387) 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, 1110657192 + ... + 1110657217.

It is an arithmetic number, because the mean of its divisors is an integer number (7774600435).

Almost surely, 2^28877087317 is an apocalyptic number.

It is an amenable number.

28877087317 is a deficient number, since it is larger than the sum of its proper divisors (2221314423).

28877087317 is a wasteful number, since it uses less digits than its factorization.

28877087317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221314422.

The product of its (nonzero) digits is 7375872, while the sum is 58.

The spelling of 28877087317 in words is "twenty-eight billion, eight hundred seventy-seven million, eighty-seven thousand, three hundred seventeen".