428818 has 8 divisors (see below), whose sum is σ = 692748. Its totient is φ = 197904.

The previous prime is 428809. The next prime is 428833. The reversal of 428818 is 818824.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 100489 = 573^2 + 317^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 428818.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8221 + ... + 8272.

2⁴²⁸⁸¹⁸ is an apocalyptic number.

428818 is a deficient number, since it is larger than the sum of its proper divisors (263930).

428818 is a wasteful number, since it uses less digits than its factorization.

428818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16508.

The product of its digits is 4096, while the sum is 31.

The square root of 428818 is about 654.8419656681. The cubic root of 428818 is about 75.4092003774.

The spelling of 428818 in words is "four hundred twenty-eight thousand, eight hundred eighteen".