28396871 has 8 divisors (see below), whose sum is σ = 29249664. Its totient is φ = 27548640.

The previous prime is 28396861. The next prime is 28396889. The reversal of 28396871 is 17869382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28396871 - 2⁶ = 28396807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396801) 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, 14666 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (3656208).

Almost surely, 2^28396871 is an apocalyptic number.

28396871 is a deficient number, since it is larger than the sum of its proper divisors (852793).

28396871 is a wasteful number, since it uses less digits than its factorization.

28396871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281.

The product of its digits is 145152, while the sum is 44.

The square root of 28396871 is about 5328.8714565093. The cubic root of 28396871 is about 305.0868551348.

The spelling of 28396871 in words is "twenty-eight million, three hundred ninety-six thousand, eight hundred seventy-one".