28112856018 has 32 divisors (see below), whose sum is σ = 60633496896. Its totient is φ = 8638291008.

The previous prime is 28112856011. The next prime is 28112856029. The reversal of 28112856018 is 81065821182.

It is not an unprimeable number, because it can be changed into a prime (28112856011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188680 + ... + 303027.

It is an arithmetic number, because the mean of its divisors is an integer number (1894796778).

Almost surely, 2^28112856018 is an apocalyptic number.

28112856018 is an abundant number, since it is smaller than the sum of its proper divisors (32520640878).

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

28112856018 is a wasteful number, since it uses less digits than its factorization.

28112856018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492458.

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 28112856018 in words is "twenty-eight billion, one hundred twelve million, eight hundred fifty-six thousand, eighteen".