228304436489 has 2 divisors, whose sum is σ = 228304436490. Its totient is φ = 228304436488.

The previous prime is 228304436473. The next prime is 228304436509. The reversal of 228304436489 is 984634403822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117470707600 + 110833728889 = 342740^2 + 332917^2 .

It is a cyclic number.

It is not a de Polignac number, because 228304436489 - 2⁴ = 228304436473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228304436489.

It is not a weakly prime, because it can be changed into another prime (228304436429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114152218244 + 114152218245.

It is an arithmetic number, because the mean of its divisors is an integer number (114152218245).

Almost surely, 2^228304436489 is an apocalyptic number.

It is an amenable number.

228304436489 is a deficient number, since it is larger than the sum of its proper divisors (1).

228304436489 is an equidigital number, since it uses as much as digits as its factorization.

228304436489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 228304436489 in words is "two hundred twenty-eight billion, three hundred four million, four hundred thirty-six thousand, four hundred eighty-nine".