428017 has 4 divisors (see below), whose sum is σ = 441856. Its totient is φ = 414180.

The previous prime is 428003. The next prime is 428023. The reversal of 428017 is 710824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428027) 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, 6873 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (110464).

2⁴²⁸⁰¹⁷ is an apocalyptic number.

It is an amenable number.

428017 is a deficient number, since it is larger than the sum of its proper divisors (13839).

428017 is a wasteful number, since it uses less digits than its factorization.

428017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13838.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 428017 is about 654.2300818519. The cubic root of 428017 is about 75.3622181939.

The spelling of 428017 in words is "four hundred twenty-eight thousand, seventeen".