28560780311 has 8 divisors (see below), whose sum is σ = 34060061184. Its totient is φ = 23416291800.

The previous prime is 28560780307. The next prime is 28560780331. The reversal of 28560780311 is 11308706582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28560780311 - 2² = 28560780307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28560780331) 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 7 ways as a sum of consecutive naturals, for example, 88697915 + ... + 88698236.

It is an arithmetic number, because the mean of its divisors is an integer number (4257507648).

Almost surely, 2^28560780311 is an apocalyptic number.

28560780311 is a deficient number, since it is larger than the sum of its proper divisors (5499280873).

28560780311 is a wasteful number, since it uses less digits than its factorization.

28560780311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177396181.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 28560780311 in words is "twenty-eight billion, five hundred sixty million, seven hundred eighty thousand, three hundred eleven".