28118559860 has 36 divisors (see below), whose sum is σ = 59376928548. Its totient is φ = 11185001472.

The previous prime is 28118559839. The next prime is 28118559901. The reversal of 28118559860 is 6895581182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8420998756 + 19697561104 = 91766^2 + 140348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10416791 + ... + 10419489.

Almost surely, 2^28118559860 is an apocalyptic number.

28118559860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28118559860 is an abundant number, since it is smaller than the sum of its proper divisors (31258368688).

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

28118559860 is an equidigital number, since it uses as much as digits as its factorization.

28118559860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 53.

The spelling of 28118559860 in words is "twenty-eight billion, one hundred eighteen million, five hundred fifty-nine thousand, eight hundred sixty".