428823 has 24 divisors (see below), whose sum is σ = 673920. Its totient is φ = 262080.

The previous prime is 428809. The next prime is 428833. The reversal of 428823 is 328824.

It is not a de Polignac number, because 428823 - 2⁴ = 428807 is a prime.

It is a super-3 number, since 3×428823³ = 236567710631633301, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8065 + ... + 8117.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2⁴²⁸⁸²³ is an apocalyptic number.

428823 is a deficient number, since it is larger than the sum of its proper divisors (245097).

428823 is a wasteful number, since it uses less digits than its factorization.

428823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 116 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 428823 is about 654.8457833719. The cubic root of 428823 is about 75.4094934656.

Subtracting from 428823 its reverse (328824), we obtain a palindrome (99999).

The spelling of 428823 in words is "four hundred twenty-eight thousand, eight hundred twenty-three".