228728333 has 2 divisors, whose sum is σ = 228728334. Its totient is φ = 228728332.

The previous prime is 228728287. The next prime is 228728341. The reversal of 228728333 is 333827822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218507524 + 10220809 = 14782^2 + 3197^2 .

It is a cyclic number.

It is not a de Polignac number, because 228728333 - 2²⁰ = 227679757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228728393) 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 as a sum of consecutive naturals, namely, 114364166 + 114364167.

It is an arithmetic number, because the mean of its divisors is an integer number (114364167).

Almost surely, 2^228728333 is an apocalyptic number.

It is an amenable number.

228728333 is a deficient number, since it is larger than the sum of its proper divisors (1).

228728333 is an equidigital number, since it uses as much as digits as its factorization.

228728333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 228728333 is about 15123.7671563668. The cubic root of 228728333 is about 611.5612902769.

The spelling of 228728333 in words is "two hundred twenty-eight million, seven hundred twenty-eight thousand, three hundred thirty-three".