28667311028 has 12 divisors (see below), whose sum is σ = 51391399332. Its totient is φ = 13984054080.

The previous prime is 28667311027. The next prime is 28667311031. The reversal of 28667311028 is 82011376682.

It can be written as a sum of positive squares in 2 ways, for example, as 1814589604 + 26852721424 = 42598^2 + 163868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28667311028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667311027) 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 3 ways as a sum of consecutive naturals, for example, 87400175 + ... + 87400502.

It is an arithmetic number, because the mean of its divisors is an integer number (4282616611).

Almost surely, 2^28667311028 is an apocalyptic number.

It is an amenable number.

28667311028 is a deficient number, since it is larger than the sum of its proper divisors (22724088304).

28667311028 is a wasteful number, since it uses less digits than its factorization.

28667311028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174800722 (or 174800720 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 28667311028 in words is "twenty-eight billion, six hundred sixty-seven million, three hundred eleven thousand, twenty-eight".