28018565135140 has 12 divisors (see below), whose sum is σ = 58838986783836. Its totient is φ = 11207426054048.

The previous prime is 28018565135129. The next prime is 28018565135159. The reversal of 28018565135140 is 4153156581082.

It can be written as a sum of positive squares in 2 ways, for example, as 4942378137316 + 23076186997824 = 2223146^2 + 4803768^2 .

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, 700464128359 + ... + 700464128398.

It is an arithmetic number, because the mean of its divisors is an integer number (4903248898653).

Almost surely, 2^{28018565135140} is an apocalyptic number.

28018565135140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28018565135140 is an abundant number, since it is smaller than the sum of its proper divisors (30820421648696).

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

28018565135140 is a wasteful number, since it uses less digits than its factorization.

28018565135140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400928256766 (or 1400928256764 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 28018565135140 in words is "twenty-eight trillion, eighteen billion, five hundred sixty-five million, one hundred thirty-five thousand, one hundred forty".