428165 has 8 divisors (see below), whose sum is σ = 540960. Its totient is φ = 324432.

The previous prime is 428161. The next prime is 428167. The reversal of 428165 is 561824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428165 - 2² = 428161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2159 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (67620).

2⁴²⁸¹⁶⁵ is an apocalyptic number.

It is an amenable number.

428165 is a deficient number, since it is larger than the sum of its proper divisors (112795).

428165 is a wasteful number, since it uses less digits than its factorization.

428165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531.

The product of its digits is 1920, while the sum is 26.

The square root of 428165 is about 654.3431821300. The cubic root of 428165 is about 75.3709034587.

Adding to 428165 its reverse (561824), we get a palindrome (989989).

The spelling of 428165 in words is "four hundred twenty-eight thousand, one hundred sixty-five".