228128105 has 16 divisors (see below), whose sum is σ = 278982144. Its totient is φ = 179033280.

The previous prime is 228128081. The next prime is 228128111. The reversal of 228128105 is 501821822.

It is a happy number.

It is not a de Polignac number, because 228128105 - 2¹⁴ = 228111721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152672 + ... + 154158.

It is an arithmetic number, because the mean of its divisors is an integer number (17436384).

Almost surely, 2^228128105 is an apocalyptic number.

It is an amenable number.

228128105 is a deficient number, since it is larger than the sum of its proper divisors (50854039).

228128105 is a wasteful number, since it uses less digits than its factorization.

228128105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 228128105 is about 15103.9102552948. The cubic root of 228128105 is about 611.0258694022.

Adding to 228128105 its reverse (501821822), we get a palindrome (729949927).

The spelling of 228128105 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, one hundred five".