28152643108 has 12 divisors (see below), whose sum is σ = 49268748060. Its totient is φ = 14075857952.

The previous prime is 28152643069. The next prime is 28152643117. The reversal of 28152643108 is 80134625182.

It can be written as a sum of positive squares in 2 ways, for example, as 22997115904 + 5155527204 = 151648^2 + 71802^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45798 + ... + 241666.

It is an arithmetic number, because the mean of its divisors is an integer number (4105729005).

Almost surely, 2^28152643108 is an apocalyptic number.

It is an amenable number.

28152643108 is a deficient number, since it is larger than the sum of its proper divisors (21116104952).

28152643108 is a wasteful number, since it uses less digits than its factorization.

28152643108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231806 (or 231804 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 28152643108 in words is "twenty-eight billion, one hundred fifty-two million, six hundred forty-three thousand, one hundred eight".