28011384172 has 24 divisors (see below), whose sum is σ = 50281740432. Its totient is φ = 13646073600.

The previous prime is 28011384151. The next prime is 28011384173. The reversal of 28011384172 is 27148311082.

It is not an unprimeable number, because it can be changed into a prime (28011384173) 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 7 ways as a sum of consecutive naturals, for example, 12583 + ... + 237025.

It is an arithmetic number, because the mean of its divisors is an integer number (2095072518).

Almost surely, 2^28011384172 is an apocalyptic number.

It is an amenable number.

28011384172 is a deficient number, since it is larger than the sum of its proper divisors (22270356260).

28011384172 is a wasteful number, since it uses less digits than its factorization.

28011384172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225249 (or 225247 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 28011384172 in words is "twenty-eight billion, eleven million, three hundred eighty-four thousand, one hundred seventy-two".