28660111199 has 8 divisors (see below), whose sum is σ = 29125195872. Its totient is φ = 28196985600.

The previous prime is 28660111133. The next prime is 28660111219. The reversal of 28660111199 is 99111106682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28660111199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28660111099) 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, 460259 + ... + 518804.

It is an arithmetic number, because the mean of its divisors is an integer number (3640649484).

Almost surely, 2^28660111199 is an apocalyptic number.

28660111199 is a deficient number, since it is larger than the sum of its proper divisors (465084673).

28660111199 is an equidigital number, since it uses as much as digits as its factorization.

28660111199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979537.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 28660111199 in words is "twenty-eight billion, six hundred sixty million, one hundred eleven thousand, one hundred ninety-nine".