228905872 has 20 divisors (see below), whose sum is σ = 477621340. Its totient is φ = 105648768.

The previous prime is 228905857. The next prime is 228905893. The reversal of 228905872 is 278509822.

It can be written as a sum of positive squares in 2 ways, for example, as 82882816 + 146023056 = 9104^2 + 12084^2 .

It is an unprimeable number.

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, 550047 + ... + 550462.

It is an arithmetic number, because the mean of its divisors is an integer number (23881067).

Almost surely, 2^228905872 is an apocalyptic number.

It is an amenable number.

228905872 is an abundant number, since it is smaller than the sum of its proper divisors (248715468).

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

228905872 is a wasteful number, since it uses less digits than its factorization.

228905872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100530 (or 1100524 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 228905872 is about 15129.6355541037. The cubic root of 228905872 is about 611.7194807066.

The spelling of 228905872 in words is "two hundred twenty-eight million, nine hundred five thousand, eight hundred seventy-two".