28568188121 has 8 divisors (see below), whose sum is σ = 31451217600. Its totient is φ = 25732812240.

The previous prime is 28568188097. The next prime is 28568188147. The reversal of 28568188121 is 12188186582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28568188121 - 2¹⁰ = 28568187097 is a prime.

It is a super-2 number, since 2×28568188121² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28568188121.

It is not an unprimeable number, because it can be changed into a prime (28568188171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11912141 + ... + 11914538.

It is an arithmetic number, because the mean of its divisors is an integer number (3931402200).

Almost surely, 2^28568188121 is an apocalyptic number.

It is an amenable number.

28568188121 is a deficient number, since it is larger than the sum of its proper divisors (2883029479).

28568188121 is a wasteful number, since it uses less digits than its factorization.

28568188121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23826799.

The product of its digits is 491520, while the sum is 50.

The spelling of 28568188121 in words is "twenty-eight billion, five hundred sixty-eight million, one hundred eighty-eight thousand, one hundred twenty-one".