28656658802 has 6 divisors (see below), whose sum is σ = 42985347309. Its totient is φ = 14328209700.

The previous prime is 28656658783. The next prime is 28656658837. The reversal of 28656658802 is 20885665682.

It can be written as a sum of positive squares in 2 ways, for example, as 18574691521 + 10081967281 = 136289^2 + 100409^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119701.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 179552 + ... + 299252.

Almost surely, 2^28656658802 is an apocalyptic number.

28656658802 is a deficient number, since it is larger than the sum of its proper divisors (14328688507).

28656658802 is an frugal number, since it uses more digits than its factorization.

28656658802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239404 (or 119703 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 56.

The spelling of 28656658802 in words is "twenty-eight billion, six hundred fifty-six million, six hundred fifty-eight thousand, eight hundred two".