228743872 has 28 divisors (see below), whose sum is σ = 518759440. Its totient is φ = 98032896.

The previous prime is 228743863. The next prime is 228743873. The reversal of 228743872 is 278347822.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (228743873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254847 + ... + 255742.

Almost surely, 2^228743872 is an apocalyptic number.

It is an amenable number.

228743872 is an abundant number, since it is smaller than the sum of its proper divisors (290015568).

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

228743872 is an equidigital number, since it uses as much as digits as its factorization.

228743872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510608 (or 510598 counting only the distinct ones).

The product of its digits is 301056, while the sum is 43.

The square root of 228743872 is about 15124.2808754664. The cubic root of 228743872 is about 611.5751390724.

The spelling of 228743872 in words is "two hundred twenty-eight million, seven hundred forty-three thousand, eight hundred seventy-two".