428879 has 8 divisors (see below), whose sum is σ = 473088. Its totient is φ = 385560.

The previous prime is 428873. The next prime is 428899. The reversal of 428879 is 978824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428879 - 2⁴ = 428863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428873) 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 7 ways as a sum of consecutive naturals, for example, 1244 + ... + 1550.

It is an arithmetic number, because the mean of its divisors is an integer number (59136).

2⁴²⁸⁸⁷⁹ is an apocalyptic number.

428879 is a deficient number, since it is larger than the sum of its proper divisors (44209).

428879 is a wasteful number, since it uses less digits than its factorization.

428879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its digits is 32256, while the sum is 38.

The square root of 428879 is about 654.8885401349. Note that the first 3 decimals coincide. The cubic root of 428879 is about 75.4127758982.

Subtracting 428879 from its reverse (978824), we obtain a palindrome (549945).

The spelling of 428879 in words is "four hundred twenty-eight thousand, eight hundred seventy-nine".