28716 has 12 divisors (see below), whose sum is σ = 67032. Its totient is φ = 9568.

The previous prime is 28711. The next prime is 28723. The reversal of 28716 is 61782.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28711) by changing a digit.

28716 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (5586).

2²⁸⁷¹⁶ is an apocalyptic number.

It is an amenable number.

28716 is an abundant number, since it is smaller than the sum of its proper divisors (38316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33516).

28716 is a wasteful number, since it uses less digits than its factorization.

28716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2398 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 28716 is about 169.4579593882. The cubic root of 28716 is about 30.6225473532.

It can be divided in two parts, 287 and 16, that added together give a palindrome (303).

The spelling of 28716 in words is "twenty-eight thousand, seven hundred sixteen".