428205 has 8 divisors (see below), whose sum is σ = 685152. Its totient is φ = 228368.

The previous prime is 428177. The next prime is 428221. The reversal of 428205 is 502824.

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 428205 - 2⁵ = 428173 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14259 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (85644).

2⁴²⁸²⁰⁵ is an apocalyptic number.

It is an amenable number.

428205 is a deficient number, since it is larger than the sum of its proper divisors (256947).

428205 is a wasteful number, since it uses less digits than its factorization.

428205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28555.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 428205 is about 654.3737464171. The cubic root of 428205 is about 75.3732504840.

The spelling of 428205 in words is "four hundred twenty-eight thousand, two hundred five".