28695665952 has 144 divisors (see below), whose sum is σ = 85973247360. Its totient is φ = 9053876736.

The previous prime is 28695665923. The next prime is 28695665993. The reversal of 28695665952 is 25956659682.

28695665952 is a `hidden beast` number, since 2 + 8 + 69 + 566 + 5 + 9 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 28695665952.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12513318 + ... + 12515610.

It is an arithmetic number, because the mean of its divisors is an integer number (597036440).

Almost surely, 2^28695665952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28695665952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42986623680).

28695665952 is an abundant number, since it is smaller than the sum of its proper divisors (57277581408).

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

28695665952 is a wasteful number, since it uses less digits than its factorization.

28695665952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615 (or 4604 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 63.

The spelling of 28695665952 in words is "twenty-eight billion, six hundred ninety-five million, six hundred sixty-five thousand, nine hundred fifty-two".