228111128 has 16 divisors (see below), whose sum is σ = 488809680. Its totient is φ = 97761888.

The previous prime is 228111127. The next prime is 228111133. The reversal of 228111128 is 821111822.

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

It is a junction number, because it is equal to n+sod(n) for n = 228111097 and 228111106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228111127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036651 + ... + 2036762.

It is an arithmetic number, because the mean of its divisors is an integer number (30550605).

Almost surely, 2^228111128 is an apocalyptic number.

228111128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228111128 is an abundant number, since it is smaller than the sum of its proper divisors (260698552).

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

228111128 is a wasteful number, since it uses less digits than its factorization.

228111128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073426 (or 4073422 counting only the distinct ones).

The product of its digits is 512, while the sum is 26.

The square root of 228111128 is about 15103.3482380564. The cubic root of 228111128 is about 611.0107117732.

The spelling of 228111128 in words is "two hundred twenty-eight million, one hundred eleven thousand, one hundred twenty-eight".