28078764585 has 32 divisors (see below), whose sum is σ = 47300319360. Its totient is φ = 14184235008.

The previous prime is 28078764577. The next prime is 28078764607. The reversal of 28078764585 is 58546787082.

It is not a de Polignac number, because 28078764585 - 2³ = 28078764577 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2255839 + ... + 2268251.

It is an arithmetic number, because the mean of its divisors is an integer number (1478134980).

Almost surely, 2^28078764585 is an apocalyptic number.

It is an amenable number.

28078764585 is a deficient number, since it is larger than the sum of its proper divisors (19221554775).

28078764585 is a wasteful number, since it uses less digits than its factorization.

28078764585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20377.

The product of its (nonzero) digits is 30105600, while the sum is 60.

The spelling of 28078764585 in words is "twenty-eight billion, seventy-eight million, seven hundred sixty-four thousand, five hundred eighty-five".