28712269818 has 24 divisors (see below), whose sum is σ = 62557466400. Its totient is φ = 9517287624.

The previous prime is 28712269793. The next prime is 28712269829. The reversal of 28712269818 is 81896221782.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4452438 + ... + 4458881.

It is an arithmetic number, because the mean of its divisors is an integer number (2606561100).

Almost surely, 2^28712269818 is an apocalyptic number.

28712269818 is an abundant number, since it is smaller than the sum of its proper divisors (33845196582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28712269818 is a wasteful number, since it uses less digits than its factorization.

28712269818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911506 (or 8911503 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 28712269818 in words is "twenty-eight billion, seven hundred twelve million, two hundred sixty-nine thousand, eight hundred eighteen".