228123289 has 16 divisors (see below), whose sum is σ = 251382528. Its totient is φ = 206132992.

The previous prime is 228123281. The next prime is 228123331. The reversal of 228123289 is 982321822.

228123289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 228123289 - 2³ = 228123281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228123281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39654 + ... + 45040.

It is an arithmetic number, because the mean of its divisors is an integer number (15711408).

Almost surely, 2^228123289 is an apocalyptic number.

It is an amenable number.

228123289 is a deficient number, since it is larger than the sum of its proper divisors (23259239).

228123289 is a wasteful number, since it uses less digits than its factorization.

228123289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5504.

The product of its digits is 27648, while the sum is 37.

The square root of 228123289 is about 15103.7508255400. The cubic root of 228123289 is about 611.0215695940.

The spelling of 228123289 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, two hundred eighty-nine".