228628856 has 16 divisors (see below), whose sum is σ = 436768200. Its totient is φ = 112157344.

The previous prime is 228628831. The next prime is 228628861. The reversal of 228628856 is 658826822.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 228628856.

It is a congruent number.

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, 269186 + ... + 270033.

Almost surely, 2^228628856 is an apocalyptic number.

It is an amenable number.

228628856 is a deficient number, since it is larger than the sum of its proper divisors (208139344).

228628856 is a wasteful number, since it uses less digits than its factorization.

228628856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539278 (or 539274 counting only the distinct ones).

The product of its digits is 737280, while the sum is 47.

The square root of 228628856 is about 15120.4780347713. The cubic root of 228628856 is about 611.4726187027.

The spelling of 228628856 in words is "two hundred twenty-eight million, six hundred twenty-eight thousand, eight hundred fifty-six".