28885671 has 12 divisors (see below), whose sum is σ = 41786472. Its totient is φ = 19228176.

The previous prime is 28885667. The next prime is 28885679. The reversal of 28885671 is 17658882.

28885671 is a `hidden beast` number, since 2 + 8 + 88 + 567 + 1 = 666.

It is not a de Polignac number, because 28885671 - 2² = 28885667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885679) 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 11 ways as a sum of consecutive naturals, for example, 5160 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (3482206).

Almost surely, 2^28885671 is an apocalyptic number.

28885671 is a deficient number, since it is larger than the sum of its proper divisors (12900801).

28885671 is a wasteful number, since it uses less digits than its factorization.

28885671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830 (or 4827 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28885671 is about 5374.5391430336. The cubic root of 28885671 is about 306.8274095601.

The spelling of 28885671 in words is "twenty-eight million, eight hundred eighty-five thousand, six hundred seventy-one".