28128063986 has 8 divisors (see below), whose sum is σ = 46027741104. Its totient is φ = 12785483620.

The previous prime is 28128063979. The next prime is 28128063991. The reversal of 28128063986 is 68936082182.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639274160 + ... + 639274203.

It is an arithmetic number, because the mean of its divisors is an integer number (5753467638).

Almost surely, 2^28128063986 is an apocalyptic number.

28128063986 is a deficient number, since it is larger than the sum of its proper divisors (17899677118).

28128063986 is a wasteful number, since it uses less digits than its factorization.

28128063986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278548376.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 28128063986 in words is "twenty-eight billion, one hundred twenty-eight million, sixty-three thousand, nine hundred eighty-six".