428279 has 4 divisors (see below), whose sum is σ = 450840. Its totient is φ = 405720.

The previous prime is 428273. The next prime is 428297. The reversal of 428279 is 972824.

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 428279 - 2⁸ = 428023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428273) 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, 11252 + ... + 11289.

It is an arithmetic number, because the mean of its divisors is an integer number (112710).

2⁴²⁸²⁷⁹ is an apocalyptic number.

428279 is a deficient number, since it is larger than the sum of its proper divisors (22561).

428279 is a wasteful number, since it uses less digits than its factorization.

428279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22560.

The product of its digits is 8064, while the sum is 32.

The square root of 428279 is about 654.4302865852. The cubic root of 428279 is about 75.3775920955.

It can be divided in two parts, 428 and 279, that added together give a palindrome (707).

The spelling of 428279 in words is "four hundred twenty-eight thousand, two hundred seventy-nine".