28188703123 has 16 divisors (see below), whose sum is σ = 32507294400. Its totient is φ = 23943776256.

The previous prime is 28188703097. The next prime is 28188703129. The reversal of 28188703123 is 32130788182.

It is a cyclic number.

It is not a de Polignac number, because 28188703123 - 2¹⁷ = 28188572051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28188703123.

It is not an unprimeable number, because it can be changed into a prime (28188703129) 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, 420411 + ... + 482827.

It is an arithmetic number, because the mean of its divisors is an integer number (2031705900).

Almost surely, 2^28188703123 is an apocalyptic number.

28188703123 is a deficient number, since it is larger than the sum of its proper divisors (4318591277).

28188703123 is a wasteful number, since it uses less digits than its factorization.

28188703123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63006.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 28188703123 in words is "twenty-eight billion, one hundred eighty-eight million, seven hundred three thousand, one hundred twenty-three".