428578 has 8 divisors (see below), whose sum is σ = 645660. Its totient is φ = 213360.

The previous prime is 428569. The next prime is 428579. The reversal of 428578 is 875824.

It can be written as a sum of positive squares in 2 ways, for example, as 413449 + 15129 = 643^2 + 123^2 .

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

It is a d-powerful number, because it can be written as 4² + 2¹⁰ + 5⁸ + 8⁴ + 7² + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (428579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588 + ... + 1096.

2⁴²⁸⁵⁷⁸ is an apocalyptic number.

428578 is a deficient number, since it is larger than the sum of its proper divisors (217082).

428578 is a wasteful number, since it uses less digits than its factorization.

428578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

The product of its digits is 17920, while the sum is 34.

The square root of 428578 is about 654.6586897002. The cubic root of 428578 is about 75.3951294619.

It can be divided in two parts, 4 and 28578, that added together give a palindrome (28582).

The spelling of 428578 in words is "four hundred twenty-eight thousand, five hundred seventy-eight".