228161328 has 40 divisors (see below), whose sum is σ = 609745200. Its totient is φ = 73430784.

The previous prime is 228161327. The next prime is 228161389. The reversal of 228161328 is 823161822.

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

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (228161327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80563 + ... + 83346.

It is an arithmetic number, because the mean of its divisors is an integer number (15243630).

Almost surely, 2^228161328 is an apocalyptic number.

It is an amenable number.

228161328 is an abundant number, since it is smaller than the sum of its proper divisors (381583872).

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

228161328 is a wasteful number, since it uses less digits than its factorization.

228161328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163949 (or 163943 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 228161328 is about 15105.0100297881. The cubic root of 228161328 is about 611.0555298235.

The spelling of 228161328 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, three hundred twenty-eight".