228188128 has 24 divisors (see below), whose sum is σ = 513423792. Its totient is φ = 97794816.

The previous prime is 228188111. The next prime is 228188141. The reversal of 228188128 is 821881822.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509125 + ... + 509572.

It is an arithmetic number, because the mean of its divisors is an integer number (21392658).

Almost surely, 2^228188128 is an apocalyptic number.

228188128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228188128 is an abundant number, since it is smaller than the sum of its proper divisors (285235664).

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

228188128 is a wasteful number, since it uses less digits than its factorization.

228188128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018714 (or 1018706 counting only the distinct ones).

The product of its digits is 32768, while the sum is 40.

The square root of 228188128 is about 15105.8971266191. The cubic root of 228188128 is about 611.0794538997.

It can be divided in two parts, 2281 and 88128, that added together give a palindrome (90409).

The spelling of 228188128 in words is "two hundred twenty-eight million, one hundred eighty-eight thousand, one hundred twenty-eight".