28328571882 has 32 divisors (see below), whose sum is σ = 67794874560. Its totient is φ = 8716483440.

The previous prime is 28328571881. The next prime is 28328571893. The reversal of 28328571882 is 28817582382.

28328571882 is a `hidden beast` number, since 283 + 285 + 7 + 1 + 8 + 82 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28328571881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20176344 + ... + 20177747.

It is an arithmetic number, because the mean of its divisors is an integer number (2118589830).

Almost surely, 2^28328571882 is an apocalyptic number.

28328571882 is an abundant number, since it is smaller than the sum of its proper divisors (39466302678).

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

28328571882 is a wasteful number, since it uses less digits than its factorization.

28328571882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40354115 (or 40354109 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 28328571882 in words is "twenty-eight billion, three hundred twenty-eight million, five hundred seventy-one thousand, eight hundred eighty-two".