228468239 has 2 divisors, whose sum is σ = 228468240. Its totient is φ = 228468238.

The previous prime is 228468211. The next prime is 228468257. The reversal of 228468239 is 932864822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228468239 - 2¹² = 228464143 is a prime.

It is a super-2 number, since 2×228468239² = 104395472463522242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228468239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228468209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114234119 + 114234120.

It is an arithmetic number, because the mean of its divisors is an integer number (114234120).

Almost surely, 2^228468239 is an apocalyptic number.

228468239 is a deficient number, since it is larger than the sum of its proper divisors (1).

228468239 is an equidigital number, since it uses as much as digits as its factorization.

228468239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 44.

The square root of 228468239 is about 15115.1658608167. The cubic root of 228468239 is about 611.3293939916.

The spelling of 228468239 in words is "two hundred twenty-eight million, four hundred sixty-eight thousand, two hundred thirty-nine".