428023 has 2 divisors, whose sum is σ = 428024. Its totient is φ = 428022.

The previous prime is 428003. The next prime is 428027. The reversal of 428023 is 320824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428023 - 2⁵ = 427991 is a prime.

428023 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214011 + 214012.

It is an arithmetic number, because the mean of its divisors is an integer number (214012).

2⁴²⁸⁰²³ is an apocalyptic number.

428023 is a deficient number, since it is larger than the sum of its proper divisors (1).

428023 is an equidigital number, since it uses as much as digits as its factorization.

428023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 428023 is about 654.2346673786. The cubic root of 428023 is about 75.3625703381.

Adding to 428023 its reverse (320824), we get a palindrome (748847).

The spelling of 428023 in words is "four hundred twenty-eight thousand, twenty-three".