428775859 has 4 divisors (see below), whose sum is σ = 428846040. Its totient is φ = 428705680.

The previous prime is 428775803. The next prime is 428775889. The reversal of 428775859 is 958577824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428775859 - 2¹¹ = 428773811 is a prime.

It is a super-2 number, since 2×428775859² = 367697474522375762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428775889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24949 + ... + 38470.

It is an arithmetic number, because the mean of its divisors is an integer number (107211510).

Almost surely, 2^428775859 is an apocalyptic number.

428775859 is a deficient number, since it is larger than the sum of its proper divisors (70181).

428775859 is an equidigital number, since it uses as much as digits as its factorization.

428775859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70180.

The product of its digits is 5644800, while the sum is 55.

The square root of 428775859 is about 20706.9036555444. The cubic root of 428775859 is about 754.0673008055.

The spelling of 428775859 in words is "four hundred twenty-eight million, seven hundred seventy-five thousand, eight hundred fifty-nine".