28538303818 has 16 divisors (see below), whose sum is σ = 46888492680. Its totient is φ = 12966693376.

The previous prime is 28538303813. The next prime is 28538303821. The reversal of 28538303818 is 81830383582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27923412609 + 614891209 = 167103^2 + 24797^2 .

It is not an unprimeable number, because it can be changed into a prime (28538303813) 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 7 ways as a sum of consecutive naturals, for example, 14470771 + ... + 14472742.

Almost surely, 2^28538303818 is an apocalyptic number.

28538303818 is a deficient number, since it is larger than the sum of its proper divisors (18350188862).

28538303818 is a wasteful number, since it uses less digits than its factorization.

28538303818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28943561.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 28538303818 in words is "twenty-eight billion, five hundred thirty-eight million, three hundred three thousand, eight hundred eighteen".