28080708489 has 24 divisors (see below), whose sum is σ = 41561793000. Its totient is φ = 18258831360.

The previous prime is 28080708457. The next prime is 28080708499. The reversal of 28080708489 is 98480708082.

28080708489 is a `hidden beast` number, since 2 + 80 + 80 + 7 + 0 + 8 + 489 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3027200400 + 25053508089 = 55020^2 + 158283^2 .

It is not a de Polignac number, because 28080708489 - 2⁵ = 28080708457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28080708499) 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 23 ways as a sum of consecutive naturals, for example, 1707297 + ... + 1723665.

It is an arithmetic number, because the mean of its divisors is an integer number (1731741375).

Almost surely, 2^28080708489 is an apocalyptic number.

It is an amenable number.

28080708489 is a deficient number, since it is larger than the sum of its proper divisors (13481084511).

28080708489 is a wasteful number, since it uses less digits than its factorization.

28080708489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21065 (or 21062 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 28080708489 in words is "twenty-eight billion, eighty million, seven hundred eight thousand, four hundred eighty-nine".