428857859 has 2 divisors, whose sum is σ = 428857860. Its totient is φ = 428857858.

The previous prime is 428857841. The next prime is 428857879. The reversal of 428857859 is 958758824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428857859 is a prime.

It is not a weakly prime, because it can be changed into another prime (428857879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214428929 + 214428930.

It is an arithmetic number, because the mean of its divisors is an integer number (214428930).

Almost surely, 2^428857859 is an apocalyptic number.

428857859 is a deficient number, since it is larger than the sum of its proper divisors (1).

428857859 is an equidigital number, since it uses as much as digits as its factorization.

428857859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6451200, while the sum is 56.

The square root of 428857859 is about 20708.8835768614. The cubic root of 428857859 is about 754.1153675487.

The spelling of 428857859 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred fifty-nine".