28080717709 has 16 divisors (see below), whose sum is σ = 32253281280. Its totient is φ = 24178739760.

The previous prime is 28080717703. The next prime is 28080717773. The reversal of 28080717709 is 90771708082.

It is a cyclic number.

It is not a de Polignac number, because 28080717709 - 2⁵ = 28080717677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080717703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066902 + ... + 1092904.

It is an arithmetic number, because the mean of its divisors is an integer number (2015830080).

Almost surely, 2^28080717709 is an apocalyptic number.

It is an amenable number.

28080717709 is a deficient number, since it is larger than the sum of its proper divisors (4172563571).

28080717709 is a wasteful number, since it uses less digits than its factorization.

28080717709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31200.

The product of its (nonzero) digits is 395136, while the sum is 49.

The spelling of 28080717709 in words is "twenty-eight billion, eighty million, seven hundred seventeen thousand, seven hundred nine".