123228 has 48 divisors (see below), whose sum is σ = 367360. Its totient is φ = 34992.

The previous prime is 123217. The next prime is 123229. The reversal of 123228 is 822321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 123228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123229) by changing a digit.

123228 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 15 ways as a sum of consecutive naturals, for example, 675 + ... + 837.

2¹²³²²⁸ is an apocalyptic number.

123228 is a gapful number since it is divisible by the number (18) 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 123228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183680).

123228 is an abundant number, since it is smaller than the sum of its proper divisors (244132).

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

123228 is a wasteful number, since it uses less digits than its factorization.

123228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 175 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 123228 is about 351.0384594314. The cubic root of 123228 is about 49.7626080180.

Adding to 123228 its reverse (822321), we get a palindrome (945549).

It can be divided in two parts, 123 and 228, that added together give a triangular number (351 = T₂₆).

The spelling of 123228 in words is "one hundred twenty-three thousand, two hundred twenty-eight".