28320788675 has 24 divisors (see below), whose sum is σ = 37021105200. Its totient is φ = 21432228480.

The previous prime is 28320788669. The next prime is 28320788693. The reversal of 28320788675 is 57688702382.

It is a happy number.

It is not a de Polignac number, because 28320788675 - 2¹² = 28320784579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28320788675.

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, 277541 + ... + 365609.

It is an arithmetic number, because the mean of its divisors is an integer number (1542546050).

Almost surely, 2^28320788675 is an apocalyptic number.

28320788675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28320788675 is a deficient number, since it is larger than the sum of its proper divisors (8700316525).

28320788675 is a wasteful number, since it uses less digits than its factorization.

28320788675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88775 (or 88770 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 28320788675 in words is "twenty-eight billion, three hundred twenty million, seven hundred eighty-eight thousand, six hundred seventy-five".