228688243 has 6 divisors (see below), whose sum is σ = 266025156. Its totient is φ = 196018452.

The previous prime is 228688223. The next prime is 228688247. The reversal of 228688243 is 342886822.

It is not a de Polignac number, because 228688243 - 2⁹ = 228687731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228688243.

It is not an unprimeable number, because it can be changed into a prime (228688247) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2333505 + ... + 2333602.

It is an arithmetic number, because the mean of its divisors is an integer number (44337526).

Almost surely, 2^228688243 is an apocalyptic number.

228688243 is a deficient number, since it is larger than the sum of its proper divisors (37336913).

228688243 is an equidigital number, since it uses as much as digits as its factorization.

228688243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667121 (or 4667114 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 228688243 is about 15122.4417009952. The cubic root of 228688243 is about 611.5255580404.

The spelling of 228688243 in words is "two hundred twenty-eight million, six hundred eighty-eight thousand, two hundred forty-three".