428943 has 4 divisors (see below), whose sum is σ = 571928. Its totient is φ = 285960.

The previous prime is 428899. The next prime is 428951. The reversal of 428943 is 349824.

It is a happy number.

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

It is not a de Polignac number, because 428943 - 2¹⁰ = 427919 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428143) 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 3 ways as a sum of consecutive naturals, for example, 71488 + ... + 71493.

It is an arithmetic number, because the mean of its divisors is an integer number (142982).

2⁴²⁸⁹⁴³ is an apocalyptic number.

428943 is a deficient number, since it is larger than the sum of its proper divisors (142985).

428943 is a wasteful number, since it uses less digits than its factorization.

428943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142984.

The product of its digits is 6912, while the sum is 30.

The square root of 428943 is about 654.9374015889. The cubic root of 428943 is about 75.4165269000.

The spelling of 428943 in words is "four hundred twenty-eight thousand, nine hundred forty-three".