228684728 has 16 divisors (see below), whose sum is σ = 428976000. Its totient is φ = 114291136.

The previous prime is 228684713. The next prime is 228684733. The reversal of 228684728 is 827486822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18068 + ... + 27996.

It is an arithmetic number, because the mean of its divisors is an integer number (26811000).

Almost surely, 2^228684728 is an apocalyptic number.

It is an amenable number.

228684728 is a deficient number, since it is larger than the sum of its proper divisors (200291272).

228684728 is a wasteful number, since it uses less digits than its factorization.

228684728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12814 (or 12810 counting only the distinct ones).

The product of its digits is 688128, while the sum is 47.

The square root of 228684728 is about 15122.3254825440. The cubic root of 228684728 is about 611.5224249201.

The spelling of 228684728 in words is "two hundred twenty-eight million, six hundred eighty-four thousand, seven hundred twenty-eight".