228392 has 8 divisors (see below), whose sum is σ = 428250. Its totient is φ = 114192.

The previous prime is 228383. The next prime is 228409. The reversal of 228392 is 293822.

228392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 217156 + 11236 = 466^2 + 106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

228392 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14267 + ... + 14282.

2²²⁸³⁹² is an apocalyptic number.

It is an amenable number.

228392 is a deficient number, since it is larger than the sum of its proper divisors (199858).

228392 is a wasteful number, since it uses less digits than its factorization.

228392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28555 (or 28551 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 228392 is about 477.9037560011. The cubic root of 228392 is about 61.1261386980.

The spelling of 228392 in words is "two hundred twenty-eight thousand, three hundred ninety-two".