228085393 has 2 divisors, whose sum is σ = 228085394. Its totient is φ = 228085392.

The previous prime is 228085391. The next prime is 228085399. The reversal of 228085393 is 393580822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220730449 + 7354944 = 14857^2 + 2712^2 .

It is a cyclic number.

It is not a de Polignac number, because 228085393 - 2¹ = 228085391 is a prime.

Together with 228085391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (228085391) 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, 114042696 + 114042697.

It is an arithmetic number, because the mean of its divisors is an integer number (114042697).

Almost surely, 2^228085393 is an apocalyptic number.

It is an amenable number.

228085393 is a deficient number, since it is larger than the sum of its proper divisors (1).

228085393 is an equidigital number, since it uses as much as digits as its factorization.

228085393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 228085393 is about 15102.4962506203. The cubic root of 228085393 is about 610.9877332771.

The spelling of 228085393 in words is "two hundred twenty-eight million, eighty-five thousand, three hundred ninety-three".