228784 has 20 divisors (see below), whose sum is σ = 451360. Its totient is φ = 112320.

The previous prime is 228773. The next prime is 228793. The reversal of 228784 is 487822.

It is an unprimeable number.

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, 1174 + ... + 1354.

It is an arithmetic number, because the mean of its divisors is an integer number (22568).

2²²⁸⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

228784 is a deficient number, since it is larger than the sum of its proper divisors (222576).

228784 is a wasteful number, since it uses less digits than its factorization.

228784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 262 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 228784 is about 478.3137045915. The cubic root of 228784 is about 61.1610899378.

The spelling of 228784 in words is "two hundred twenty-eight thousand, seven hundred eighty-four".