28360 has 16 divisors (see below), whose sum is σ = 63900. Its totient is φ = 11328.

The previous prime is 28351. The next prime is 28387. The reversal of 28360 is 6382.

28360 = T₁₀₄ + T₁₀₅ + ... + T₁₀₈.

It can be written as a sum of positive squares in 2 ways, for example, as 26244 + 2116 = 162^2 + 46^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

28360 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, 315 + ... + 394.

2²⁸³⁶⁰ is an apocalyptic number.

28360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28360 is the 138-th centered triangular number.

It is an amenable number.

28360 is an abundant number, since it is smaller than the sum of its proper divisors (35540).

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 (31950).

28360 is a wasteful number, since it uses less digits than its factorization.

28360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 28360 is about 168.4042754802. The cubic root of 28360 is about 30.4954754553.

It can be divided in two parts, 283 and 60, that added together give a palindrome (343).

The spelling of 28360 in words is "twenty-eight thousand, three hundred sixty".