228128 has 12 divisors (see below), whose sum is σ = 449190. Its totient is φ = 114048.

The previous prime is 228127. The next prime is 228131. The reversal of 228128 is 821822.

228128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 183184 + 44944 = 428^2 + 212^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (228127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3533 + ... + 3596.

2²²⁸¹²⁸ is an apocalyptic number.

It is an amenable number.

228128 is a deficient number, since it is larger than the sum of its proper divisors (221062).

228128 is an equidigital number, since it uses as much as digits as its factorization.

228128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7139 (or 7131 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 228128 is about 477.6274698968. The cubic root of 228128 is about 61.1025775657.

The spelling of 228128 in words is "two hundred twenty-eight thousand, one hundred twenty-eight".