228143872 has 36 divisors (see below), whose sum is σ = 496802376. Its totient is φ = 103700480.

The previous prime is 228143869. The next prime is 228143873. The reversal of 228143872 is 278341822.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (228143873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37693 + ... + 43324.

It is an arithmetic number, because the mean of its divisors is an integer number (13800066).

Almost surely, 2^228143872 is an apocalyptic number.

228143872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

228143872 is an abundant number, since it is smaller than the sum of its proper divisors (268658504).

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

228143872 is an equidigital number, since it uses as much as digits as its factorization.

228143872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81044 (or 81030 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 228143872 is about 15104.4321972062. The cubic root of 228143872 is about 611.0399460295.

The spelling of 228143872 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred seventy-two".