28680102857 has 4 divisors (see below), whose sum is σ = 32777260416. Its totient is φ = 24582945300.

The previous prime is 28680102853. The next prime is 28680102877. The reversal of 28680102857 is 75820108682.

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 28680102857 - 2² = 28680102853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28680102851) 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, 2048578769 + ... + 2048578782.

It is an arithmetic number, because the mean of its divisors is an integer number (8194315104).

Almost surely, 2^28680102857 is an apocalyptic number.

It is an amenable number.

28680102857 is a deficient number, since it is larger than the sum of its proper divisors (4097157559).

28680102857 is an equidigital number, since it uses as much as digits as its factorization.

28680102857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097157558.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 28680102857 in words is "twenty-eight billion, six hundred eighty million, one hundred two thousand, eight hundred fifty-seven".