28807782864 has 60 divisors (see below), whose sum is σ = 86570334144. Its totient is φ = 8230794432.

The previous prime is 28807782863. The next prime is 28807782901. The reversal of 28807782864 is 46828770882.

It is a junction number, because it is equal to n+sod(n) for n = 28807782798 and 28807782807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807782863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6121752 + ... + 6126455.

Almost surely, 2^28807782864 is an apocalyptic number.

28807782864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28807782864 is an abundant number, since it is smaller than the sum of its proper divisors (57762551280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28807782864 is a wasteful number, since it uses less digits than its factorization.

28807782864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12248232 (or 12248219 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 60.

The spelling of 28807782864 in words is "twenty-eight billion, eight hundred seven million, seven hundred eighty-two thousand, eight hundred sixty-four".