28312806256 has 40 divisors (see below), whose sum is σ = 64854465120. Its totient is φ = 11715642624.

The previous prime is 28312806239. The next prime is 28312806257. The reversal of 28312806256 is 65260821382.

It is a super-5 number, since 5×28312806256⁵ (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312806257) 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 7 ways as a sum of consecutive naturals, for example, 4355251 + ... + 4361746.

It is an arithmetic number, because the mean of its divisors is an integer number (1621361628).

Almost surely, 2^28312806256 is an apocalyptic number.

It is an amenable number.

28312806256 is an abundant number, since it is smaller than the sum of its proper divisors (36541658864).

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

28312806256 is a wasteful number, since it uses less digits than its factorization.

28312806256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8717041 (or 8717035 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 28312806256 in words is "twenty-eight billion, three hundred twelve million, eight hundred six thousand, two hundred fifty-six".