28178888055 has 32 divisors (see below), whose sum is σ = 46666229760. Its totient is φ = 14502633600.

The previous prime is 28178888051. The next prime is 28178888057. The reversal of 28178888055 is 55088887182.

It is not a de Polignac number, because 28178888055 - 2² = 28178888051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28178888055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28178888051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 832084 + ... + 865286.

It is an arithmetic number, because the mean of its divisors is an integer number (1458319680).

Almost surely, 2^28178888055 is an apocalyptic number.

28178888055 is a deficient number, since it is larger than the sum of its proper divisors (18487341705).

28178888055 is a wasteful number, since it uses less digits than its factorization.

28178888055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35191.

The product of its (nonzero) digits is 11468800, while the sum is 60.

The spelling of 28178888055 in words is "twenty-eight billion, one hundred seventy-eight million, eight hundred eighty-eight thousand, fifty-five".