428386271 has 2 divisors, whose sum is σ = 428386272. Its totient is φ = 428386270.

The previous prime is 428386249. The next prime is 428386279. The reversal of 428386271 is 172683824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428386271 - 2¹⁸ = 428124127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428386279) 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, 214193135 + 214193136.

It is an arithmetic number, because the mean of its divisors is an integer number (214193136).

Almost surely, 2^428386271 is an apocalyptic number.

428386271 is a deficient number, since it is larger than the sum of its proper divisors (1).

428386271 is an equidigital number, since it uses as much as digits as its factorization.

428386271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 428386271 is about 20697.4943169457. The cubic root of 428386271 is about 753.8388484290.

The spelling of 428386271 in words is "four hundred twenty-eight million, three hundred eighty-six thousand, two hundred seventy-one".