28675663685 has 8 divisors (see below), whose sum is σ = 34413332760. Its totient is φ = 22938840064.

The previous prime is 28675663673. The next prime is 28675663717. The reversal of 28675663685 is 58636657682.

It can be written as a sum of positive squares in 4 ways, for example, as 767622436 + 27908041249 = 27706^2 + 167057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28675663685 - 2¹⁰ = 28675662661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134180 + ... + 274509.

It is an arithmetic number, because the mean of its divisors is an integer number (4301666595).

Almost surely, 2^28675663685 is an apocalyptic number.

It is an amenable number.

28675663685 is a deficient number, since it is larger than the sum of its proper divisors (5737669075).

28675663685 is a wasteful number, since it uses less digits than its factorization.

28675663685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422727.

The product of its digits is 87091200, while the sum is 62.

The spelling of 28675663685 in words is "twenty-eight billion, six hundred seventy-five million, six hundred sixty-three thousand, six hundred eighty-five".