28005871112 has 12 divisors (see below), whose sum is σ = 52511895855. Its totient is φ = 14002698888.

The previous prime is 28005871099. The next prime is 28005871141. The reversal of 28005871112 is 21117850082.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 14002935556 + 14002935556 = 118334^2 + 118334^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118334.

It is a super-2 number, since 2×28005871112² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 443753 + ... + 502919.

Almost surely, 2^28005871112 is an apocalyptic number.

It is an amenable number.

28005871112 is a deficient number, since it is larger than the sum of its proper divisors (24506024743).

28005871112 is an frugal number, since it uses more digits than its factorization.

28005871112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118340 (or 59169 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

The spelling of 28005871112 in words is "twenty-eight billion, five million, eight hundred seventy-one thousand, one hundred twelve".