28866872328 has 32 divisors (see below), whose sum is σ = 82476778560. Its totient is φ = 8247677760.

The previous prime is 28866872327. The next prime is 28866872329. The reversal of 28866872328 is 82327866882.

It is an interprime number because it is at equal distance from previous prime (28866872327) and next prime (28866872329).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28866872327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85913143 + ... + 85913478.

It is an arithmetic number, because the mean of its divisors is an integer number (2577399330).

Almost surely, 2^28866872328 is an apocalyptic number.

28866872328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28866872328 is an abundant number, since it is smaller than the sum of its proper divisors (53609906232).

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

28866872328 is a wasteful number, since it uses less digits than its factorization.

28866872328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171826637 (or 171826633 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 60.

The spelling of 28866872328 in words is "twenty-eight billion, eight hundred sixty-six million, eight hundred seventy-two thousand, three hundred twenty-eight".