428365859 has 2 divisors, whose sum is σ = 428365860. Its totient is φ = 428365858.

The previous prime is 428365841. The next prime is 428365867. The reversal of 428365859 is 958563824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428365859 - 2⁸ = 428365603 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (428365879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214182929 + 214182930.

It is an arithmetic number, because the mean of its divisors is an integer number (214182930).

Almost surely, 2^428365859 is an apocalyptic number.

428365859 is a deficient number, since it is larger than the sum of its proper divisors (1).

428365859 is an equidigital number, since it uses as much as digits as its factorization.

428365859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 50.

The square root of 428365859 is about 20697.0012079045. The cubic root of 428365859 is about 753.8268751205.

Subtracting from 428365859 its sum of digits (50), we obtain a square (428365809 = 20697²).

The spelling of 428365859 in words is "four hundred twenty-eight million, three hundred sixty-five thousand, eight hundred fifty-nine".