28805871 has 16 divisors (see below), whose sum is σ = 41438304. Its totient is φ = 17731584.

The previous prime is 28805857. The next prime is 28805891. The reversal of 28805871 is 17850882.

It is not a de Polignac number, because 28805871 - 2¹¹ = 28803823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28805891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2626 + ... + 8031.

It is an arithmetic number, because the mean of its divisors is an integer number (2589894).

Almost surely, 2^28805871 is an apocalyptic number.

28805871 is a deficient number, since it is larger than the sum of its proper divisors (12632433).

28805871 is a wasteful number, since it uses less digits than its factorization.

28805871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 28805871 is about 5367.1101162544. The cubic root of 28805871 is about 306.5446002583.

The spelling of 28805871 in words is "twenty-eight million, eight hundred five thousand, eight hundred seventy-one".