28230711986 has 16 divisors (see below), whose sum is σ = 42932865048. Its totient is φ = 13919817600.

The previous prime is 28230711973. The next prime is 28230712033. The reversal of 28230711986 is 68911703282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28104846025 + 125865961 = 167645^2 + 11219^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28230711986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329896 + ... + 1350956.

Almost surely, 2^28230711986 is an apocalyptic number.

28230711986 is a deficient number, since it is larger than the sum of its proper divisors (14702153062).

28230711986 is a wasteful number, since it uses less digits than its factorization.

28230711986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30317.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 28230711986 in words is "twenty-eight billion, two hundred thirty million, seven hundred eleven thousand, nine hundred eighty-six".