228398399 has 2 divisors, whose sum is σ = 228398400. Its totient is φ = 228398398.

The previous prime is 228398353. The next prime is 228398437. The reversal of 228398399 is 993893822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228398399 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228398399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228398309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114199199 + 114199200.

It is an arithmetic number, because the mean of its divisors is an integer number (114199200).

Almost surely, 2^228398399 is an apocalyptic number.

228398399 is a deficient number, since it is larger than the sum of its proper divisors (1).

228398399 is an equidigital number, since it uses as much as digits as its factorization.

228398399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The square root of 228398399 is about 15112.8554217924. The cubic root of 228398399 is about 611.2670956224.

The spelling of 228398399 in words is "two hundred twenty-eight million, three hundred ninety-eight thousand, three hundred ninety-nine".