28516 has 6 divisors (see below), whose sum is σ = 49910. Its totient is φ = 14256.

The previous prime is 28513. The next prime is 28517. The reversal of 28516 is 61582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25600 + 2916 = 160^2 + 54^2 .

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (28513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561 + ... + 3568.

2²⁸⁵¹⁶ is an apocalyptic number.

It is an amenable number.

28516 is a deficient number, since it is larger than the sum of its proper divisors (21394).

28516 is a wasteful number, since it uses less digits than its factorization.

28516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133 (or 7131 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 28516 is about 168.8668114225. The cubic root of 28516 is about 30.5512887829.

It can be divided in two parts, 285 and 16, that multiplied together give a triangular number (4560 = T₉₅).

The spelling of 28516 in words is "twenty-eight thousand, five hundred sixteen".