428479 has 4 divisors (see below), whose sum is σ = 432520. Its totient is φ = 424440.

The previous prime is 428473. The next prime is 428489. The reversal of 428479 is 974824.

It is a happy number.

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 428479 - 2³ = 428471 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428471) 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, 1857 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (108130).

2⁴²⁸⁴⁷⁹ is an apocalyptic number.

428479 is a deficient number, since it is larger than the sum of its proper divisors (4041).

428479 is a wasteful number, since it uses less digits than its factorization.

428479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040.

The product of its digits is 16128, while the sum is 34.

The square root of 428479 is about 654.5830734139. The cubic root of 428479 is about 75.3893236788.

The spelling of 428479 in words is "four hundred twenty-eight thousand, four hundred seventy-nine".