28988027161 has 4 divisors (see below), whose sum is σ = 30248376192. Its totient is φ = 27727678132.

The previous prime is 28988027153. The next prime is 28988027191. The reversal of 28988027161 is 16172088982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28988027161 - 2³ = 28988027153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28988027099 and 28988027108.

It is not an unprimeable number, because it can be changed into a prime (28988027191) 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 3 ways as a sum of consecutive naturals, for example, 630174481 + ... + 630174526.

It is an arithmetic number, because the mean of its divisors is an integer number (7562094048).

Almost surely, 2^28988027161 is an apocalyptic number.

It is an amenable number.

28988027161 is a deficient number, since it is larger than the sum of its proper divisors (1260349031).

28988027161 is a wasteful number, since it uses less digits than its factorization.

28988027161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260349030.

The product of its (nonzero) digits is 774144, while the sum is 52.

The spelling of 28988027161 in words is "twenty-eight billion, nine hundred eighty-eight million, twenty-seven thousand, one hundred sixty-one".