28056108018 has 32 divisors (see below), whose sum is σ = 56404567296. Its totient is φ = 9303430608.

The previous prime is 28056108013. The next prime is 28056108061. The reversal of 28056108018 is 81080165082.

It is not an unprimeable number, because it can be changed into a prime (28056108011) 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 15 ways as a sum of consecutive naturals, for example, 948805 + ... + 977927.

It is an arithmetic number, because the mean of its divisors is an integer number (1762642728).

Almost surely, 2^28056108018 is an apocalyptic number.

28056108018 is an abundant number, since it is smaller than the sum of its proper divisors (28348459278).

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

28056108018 is a wasteful number, since it uses less digits than its factorization.

28056108018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29958.

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 28056108018 in words is "twenty-eight billion, fifty-six million, one hundred eight thousand, eighteen".