28091836860 has 48 divisors (see below), whose sum is σ = 78706664736. Its totient is φ = 7486440192.

The previous prime is 28091836837. The next prime is 28091836867. The reversal of 28091836860 is 6863819082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28091836867) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50767 + ... + 242406.

It is an arithmetic number, because the mean of its divisors is an integer number (1639722182).

Almost surely, 2^28091836860 is an apocalyptic number.

28091836860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28091836860 is an abundant number, since it is smaller than the sum of its proper divisors (50614827876).

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

28091836860 is a wasteful number, since it uses less digits than its factorization.

28091836860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294782 (or 294780 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 28091836860 in words is "twenty-eight billion, ninety-one million, eight hundred thirty-six thousand, eight hundred sixty".