428686 has 8 divisors (see below), whose sum is σ = 649584. Its totient is φ = 212160.

The previous prime is 428683. The next prime is 428693. The reversal of 428686 is 686824.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428683) 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, 835 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (81198).

2⁴²⁸⁶⁸⁶ is an apocalyptic number.

428686 is a deficient number, since it is larger than the sum of its proper divisors (220898).

428686 is a wasteful number, since it uses less digits than its factorization.

428686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186.

The product of its digits is 18432, while the sum is 34.

The square root of 428686 is about 654.7411702345. The cubic root of 428686 is about 75.4014620237.

The spelling of 428686 in words is "four hundred twenty-eight thousand, six hundred eighty-six".