428223 has 8 divisors (see below), whose sum is σ = 574000. Its totient is φ = 283968.

The previous prime is 428221. The next prime is 428227. The reversal of 428223 is 322824.

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

It is not a de Polignac number, because 428223 - 2¹ = 428221 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 428223.

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 428223.

It is not an unprimeable number, because it can be changed into a prime (428221) 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 7 ways as a sum of consecutive naturals, for example, 843 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (71750).

2⁴²⁸²²³ is an apocalyptic number.

428223 is a deficient number, since it is larger than the sum of its proper divisors (145777).

428223 is a wasteful number, since it uses less digits than its factorization.

428223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its digits is 768, while the sum is 21.

The square root of 428223 is about 654.3874998806. The cubic root of 428223 is about 75.3743065977.

The spelling of 428223 in words is "four hundred twenty-eight thousand, two hundred twenty-three".