28080520385 has 16 divisors (see below), whose sum is σ = 34236846720. Its totient is φ = 22106663040.

The previous prime is 28080520343. The next prime is 28080520387. The reversal of 28080520385 is 58302508082.

It is not a de Polignac number, because 28080520385 - 2¹⁶ = 28080454849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28080520387) 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, 55637 + ... + 243426.

It is an arithmetic number, because the mean of its divisors is an integer number (2139802920).

Almost surely, 2^28080520385 is an apocalyptic number.

It is an amenable number.

28080520385 is a deficient number, since it is larger than the sum of its proper divisors (6156326335).

28080520385 is a wasteful number, since it uses less digits than its factorization.

28080520385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299368.

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 28080520385 in words is "twenty-eight billion, eighty million, five hundred twenty thousand, three hundred eighty-five".