228333389 has 2 divisors, whose sum is σ = 228333390. Its totient is φ = 228333388.

The previous prime is 228333361. The next prime is 228333407. The reversal of 228333389 is 983333822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209757289 + 18576100 = 14483^2 + 4310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228333389 is a prime.

It is a super-2 number, since 2×228333389² = 104272273064450642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228333689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114166694 + 114166695.

It is an arithmetic number, because the mean of its divisors is an integer number (114166695).

Almost surely, 2^228333389 is an apocalyptic number.

It is an amenable number.

228333389 is a deficient number, since it is larger than the sum of its proper divisors (1).

228333389 is an equidigital number, since it uses as much as digits as its factorization.

228333389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 228333389 is about 15110.7044508190. The cubic root of 228333389 is about 611.2090942748.

The spelling of 228333389 in words is "two hundred twenty-eight million, three hundred thirty-three thousand, three hundred eighty-nine".