28011384169 has 12 divisors (see below), whose sum is σ = 28831546128. Its totient is φ = 27213958800.

The previous prime is 28011384151. The next prime is 28011384173. The reversal of 28011384169 is 96148311082.

It is not a de Polignac number, because 28011384169 - 2⁹ = 28011383657 is a prime.

It is a super-2 number, since 2×28011384169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28011384119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 931174 + ... + 960784.

It is an arithmetic number, because the mean of its divisors is an integer number (2402628844).

Almost surely, 2^28011384169 is an apocalyptic number.

It is an amenable number.

28011384169 is a deficient number, since it is larger than the sum of its proper divisors (820161959).

28011384169 is an equidigital number, since it uses as much as digits as its factorization.

28011384169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30376 (or 30339 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 28011384169 in words is "twenty-eight billion, eleven million, three hundred eighty-four thousand, one hundred sixty-nine".