28538186386 has 16 divisors (see below), whose sum is σ = 43288829208. Its totient is φ = 14109177600.

The previous prime is 28538186357. The next prime is 28538186387. The reversal of 28538186386 is 68368183582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14334075625 + 14204110761 = 119725^2 + 119181^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28538186386.

It is not an unprimeable number, because it can be changed into a prime (28538186387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54825 + ... + 245116.

Almost surely, 2^28538186386 is an apocalyptic number.

28538186386 is a deficient number, since it is larger than the sum of its proper divisors (14750642822).

28538186386 is a wasteful number, since it uses less digits than its factorization.

28538186386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300477.

The product of its digits is 13271040, while the sum is 58.

The spelling of 28538186386 in words is "twenty-eight billion, five hundred thirty-eight million, one hundred eighty-six thousand, three hundred eighty-six".