228335389 has 2 divisors, whose sum is σ = 228335390. Its totient is φ = 228335388.

The previous prime is 228335377. The next prime is 228335413. The reversal of 228335389 is 983533822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215590489 + 12744900 = 14683^2 + 3570^2 .

It is a cyclic number.

It is not a de Polignac number, because 228335389 - 2⁹ = 228334877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228335309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114167694 + 114167695.

It is an arithmetic number, because the mean of its divisors is an integer number (114167695).

Almost surely, 2^228335389 is an apocalyptic number.

It is an amenable number.

228335389 is a deficient number, since it is larger than the sum of its proper divisors (1).

228335389 is an equidigital number, since it uses as much as digits as its factorization.

228335389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 228335389 is about 15110.7706289256. The cubic root of 228335389 is about 611.2108788213.

The spelling of 228335389 in words is "two hundred twenty-eight million, three hundred thirty-five thousand, three hundred eighty-nine".