28668686682 has 16 divisors (see below), whose sum is σ = 58193155872. Its totient is φ = 9413598480.

The previous prime is 28668686681. The next prime is 28668686699.

28668686682 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (28668686681) 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, 35657169 + ... + 35657972.

It is an arithmetic number, because the mean of its divisors is an integer number (3637072242).

Almost surely, 2^28668686682 is an apocalyptic number.

28668686682 is an abundant number, since it is smaller than the sum of its proper divisors (29524469190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28668686682 is a wasteful number, since it uses less digits than its factorization.

28668686682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71315213.

The product of its digits is 127401984, while the sum is 66.

The spelling of 28668686682 in words is "twenty-eight billion, six hundred sixty-eight million, six hundred eighty-six thousand, six hundred eighty-two".