28011384171 has 16 divisors (see below), whose sum is σ = 42929325600. Its totient is φ = 18030315744.

The previous prime is 28011384151. The next prime is 28011384173. The reversal of 28011384171 is 17148311082.

It is not a de Polignac number, because 28011384171 - 2¹¹ = 28011382123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28011384173) 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, 17886436 + ... + 17888001.

It is an arithmetic number, because the mean of its divisors is an integer number (2683082850).

Almost surely, 2^28011384171 is an apocalyptic number.

28011384171 is a deficient number, since it is larger than the sum of its proper divisors (14917941429).

28011384171 is a wasteful number, since it uses less digits than its factorization.

28011384171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35774475 (or 35774469 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 28011384171 in words is "twenty-eight billion, eleven million, three hundred eighty-four thousand, one hundred seventy-one".