428717 has 4 divisors (see below), whose sum is σ = 436860. Its totient is φ = 420576.

The previous prime is 428693. The next prime is 428731. The reversal of 428717 is 717824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 121801 + 306916 = 349^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 428717 - 2¹⁴ = 412333 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 428717.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428717.

It is not an unprimeable number, because it can be changed into a prime (428777) 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, 3992 + ... + 4097.

It is an arithmetic number, because the mean of its divisors is an integer number (109215).

2⁴²⁸⁷¹⁷ is an apocalyptic number.

It is an amenable number.

428717 is a deficient number, since it is larger than the sum of its proper divisors (8143).

428717 is an equidigital number, since it uses as much as digits as its factorization.

428717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142.

The product of its digits is 3136, while the sum is 29.

The square root of 428717 is about 654.7648432834. The cubic root of 428717 is about 75.4032795071.

The spelling of 428717 in words is "four hundred twenty-eight thousand, seven hundred seventeen".