28868638273 has 4 divisors (see below), whose sum is σ = 29019783168. Its totient is φ = 28717493380.

The previous prime is 28868638261. The next prime is 28868638303. The reversal of 28868638273 is 37283686882.

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 28868638273 - 2⁵ = 28868638241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28868638243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75572161 + ... + 75572542.

It is an arithmetic number, because the mean of its divisors is an integer number (7254945792).

Almost surely, 2^28868638273 is an apocalyptic number.

It is an amenable number.

28868638273 is a deficient number, since it is larger than the sum of its proper divisors (151144895).

28868638273 is a wasteful number, since it uses less digits than its factorization.

28868638273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151144894.

The product of its digits is 37158912, while the sum is 61.

The spelling of 28868638273 in words is "twenty-eight billion, eight hundred sixty-eight million, six hundred thirty-eight thousand, two hundred seventy-three".