28871165 has 8 divisors (see below), whose sum is σ = 36468960. Its totient is φ = 21881232.

The previous prime is 28871159. The next prime is 28871173. The reversal of 28871165 is 56117882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28871165 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151859 + ... + 152048.

It is an arithmetic number, because the mean of its divisors is an integer number (4558620).

Almost surely, 2^28871165 is an apocalyptic number.

It is an amenable number.

28871165 is a deficient number, since it is larger than the sum of its proper divisors (7597795).

28871165 is a wasteful number, since it uses less digits than its factorization.

28871165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303931.

The product of its digits is 26880, while the sum is 38.

The square root of 28871165 is about 5373.1894625073. The cubic root of 28871165 is about 306.7760394112.

The spelling of 28871165 in words is "twenty-eight million, eight hundred seventy-one thousand, one hundred sixty-five".