28728714286 has 24 divisors (see below), whose sum is σ = 45781868304. Its totient is φ = 13518165600.

The previous prime is 28728714283. The next prime is 28728714319. The reversal of 28728714286 is 68241782782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728714283) 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 11 ways as a sum of consecutive naturals, for example, 22735 + ... + 240778.

It is an arithmetic number, because the mean of its divisors is an integer number (1907577846).

Almost surely, 2^28728714286 is an apocalyptic number.

28728714286 is a deficient number, since it is larger than the sum of its proper divisors (17053154018).

28728714286 is a wasteful number, since it uses less digits than its factorization.

28728714286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263704 (or 263685 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 55.

The spelling of 28728714286 in words is "twenty-eight billion, seven hundred twenty-eight million, seven hundred fourteen thousand, two hundred eighty-six".