228280 has 32 divisors (see below), whose sum is σ = 554400. Its totient is φ = 84096.

The previous prime is 228257. The next prime is 228281. The reversal of 228280 is 82822.

It is a super-2 number, since 2×228280² = 104223516800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301 + ... + 739.

It is an arithmetic number, because the mean of its divisors is an integer number (17325).

2²²⁸²⁸⁰ is an apocalyptic number.

228280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277200).

228280 is an abundant number, since it is smaller than the sum of its proper divisors (326120).

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

228280 is a wasteful number, since it uses less digits than its factorization.

228280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 228280 is about 477.7865632267. The cubic root of 228280 is about 61.1161452847.

It can be divided in two parts, 2 and 28280, that added together give a palindrome (28282).

The spelling of 228280 in words is "two hundred twenty-eight thousand, two hundred eighty".