228215872 has 28 divisors (see below), whose sum is σ = 453355456. Its totient is φ = 113984640.

The previous prime is 228215857. The next prime is 228215873. The reversal of 228215872 is 278512822.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (228215873) 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, 97597 + ... + 99907.

Almost surely, 2^228215872 is an apocalyptic number.

It is an amenable number.

228215872 is a deficient number, since it is larger than the sum of its proper divisors (225139584).

228215872 is a wasteful number, since it uses less digits than its factorization.

228215872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866 (or 3856 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 228215872 is about 15106.8154155666. The cubic root of 228215872 is about 611.1042187016.

The spelling of 228215872 in words is "two hundred twenty-eight million, two hundred fifteen thousand, eight hundred seventy-two".