28105308060580 has 12 divisors (see below), whose sum is σ = 59021146927260. Its totient is φ = 11242123224224.

The previous prime is 28105308060527. The next prime is 28105308060607. The reversal of 28105308060580 is 8506080350182.

It can be written as a sum of positive squares in 2 ways, for example, as 17803724546916 + 10301583513664 = 4219446^2 + 3209608^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28105308060580.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702632701495 + ... + 702632701534.

It is an arithmetic number, because the mean of its divisors is an integer number (4918428910605).

Almost surely, 2^{28105308060580} is an apocalyptic number.

28105308060580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28105308060580 is an abundant number, since it is smaller than the sum of its proper divisors (30915838866680).

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

28105308060580 is a wasteful number, since it uses less digits than its factorization.

28105308060580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405265403038 (or 1405265403036 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 28105308060580 in words is "twenty-eight trillion, one hundred five billion, three hundred eight million, sixty thousand, five hundred eighty".