428917 has 4 divisors (see below), whose sum is σ = 431020. Its totient is φ = 426816.

The previous prime is 428899. The next prime is 428951. The reversal of 428917 is 719824.

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 192721 + 236196 = 439^2 + 486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428957) 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 in 3 ways as a sum of consecutive naturals, for example, 708 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (107755).

2⁴²⁸⁹¹⁷ is an apocalyptic number.

It is an amenable number.

428917 is a deficient number, since it is larger than the sum of its proper divisors (2103).

428917 is a wasteful number, since it uses less digits than its factorization.

428917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102.

The product of its digits is 4032, while the sum is 31.

The square root of 428917 is about 654.9175520629. The cubic root of 428917 is about 75.4150031005.

The spelling of 428917 in words is "four hundred twenty-eight thousand, nine hundred seventeen".