28080188866 has 8 divisors (see below), whose sum is σ = 42159910464. Its totient is φ = 14026885380.

The previous prime is 28080188849. The next prime is 28080188867. The reversal of 28080188866 is 66888108082.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28080188867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6601870 + ... + 6606121.

It is an arithmetic number, because the mean of its divisors is an integer number (5269988808).

Almost surely, 2^28080188866 is an apocalyptic number.

28080188866 is a deficient number, since it is larger than the sum of its proper divisors (14079721598).

28080188866 is a wasteful number, since it uses less digits than its factorization.

28080188866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13209056.

The product of its (nonzero) digits is 2359296, while the sum is 55.

The spelling of 28080188866 in words is "twenty-eight billion, eighty million, one hundred eighty-eight thousand, eight hundred sixty-six".