28965 has 8 divisors (see below), whose sum is σ = 46368. Its totient is φ = 15440.

The previous prime is 28961. The next prime is 28979. The reversal of 28965 is 56982.

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

It is not a de Polignac number, because 28965 - 2² = 28961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (5796).

2²⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

28965 is a deficient number, since it is larger than the sum of its proper divisors (17403).

28965 is a wasteful number, since it uses less digits than its factorization.

28965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its digits is 4320, while the sum is 30.

The square root of 28965 is about 170.1910690959. The cubic root of 28965 is about 30.7108033859.

The spelling of 28965 in words is "twenty-eight thousand, nine hundred sixty-five".