428923 has 4 divisors (see below), whose sum is σ = 467928. Its totient is φ = 389920.

The previous prime is 428899. The next prime is 428951. The reversal of 428923 is 329824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428923 - 2⁹ = 428411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428891 and 428900.

It is not an unprimeable number, because it can be changed into a prime (428023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19486 + ... + 19507.

It is an arithmetic number, because the mean of its divisors is an integer number (116982).

2⁴²⁸⁹²³ is an apocalyptic number.

428923 is a deficient number, since it is larger than the sum of its proper divisors (39005).

428923 is a wasteful number, since it uses less digits than its factorization.

428923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39004.

The product of its digits is 3456, while the sum is 28.

The square root of 428923 is about 654.9221327761. The cubic root of 428923 is about 75.4153547520.

Subtracting from 428923 its reverse (329824), we obtain a palindrome (99099).

The spelling of 428923 in words is "four hundred twenty-eight thousand, nine hundred twenty-three".