28102882317 has 4 divisors (see below), whose sum is σ = 37470509760. Its totient is φ = 18735254876.

The previous prime is 28102882309. The next prime is 28102882319. The reversal of 28102882317 is 71328820182.

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 28102882317 - 2³ = 28102882309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28102882319) 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, 4683813717 + ... + 4683813722.

It is an arithmetic number, because the mean of its divisors is an integer number (9367627440).

Almost surely, 2^28102882317 is an apocalyptic number.

It is an amenable number.

28102882317 is a deficient number, since it is larger than the sum of its proper divisors (9367627443).

28102882317 is an equidigital number, since it uses as much as digits as its factorization.

28102882317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9367627442.

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 28102882317 in words is "twenty-eight billion, one hundred two million, eight hundred eighty-two thousand, three hundred seventeen".