28371 has 12 divisors (see below), whose sum is σ = 44232. Its totient is φ = 16128.

The previous prime is 28351. The next prime is 28387. The reversal of 28371 is 17382.

Added to its reverse (17382) it gives a triangular number (45753 = T₃₀₂).

It is not a de Polignac number, because 28371 - 2⁶ = 28307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (28351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (3686).

2²⁸³⁷¹ is an apocalyptic number.

28371 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28371 is a deficient number, since it is larger than the sum of its proper divisors (15861).

28371 is a wasteful number, since it uses less digits than its factorization.

28371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 203 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 28371 is about 168.4369318172. The cubic root of 28371 is about 30.4994177081.

Adding to 28371 its reverse (17382), we get a triangular number (45753 = T₃₀₂).

The spelling of 28371 in words is "twenty-eight thousand, three hundred seventy-one".