428646 has 16 divisors (see below), whose sum is σ = 864000. Its totient is φ = 141768.

The previous prime is 428639. The next prime is 428657. The reversal of 428646 is 646824.

It is a congruent number.

It is an unprimeable number.

428646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2⁴²⁸⁶⁴⁶ is an apocalyptic number.

428646 is an abundant number, since it is smaller than the sum of its proper divisors (435354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428646 is a wasteful number, since it uses less digits than its factorization.

428646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its digits is 9216, while the sum is 30.

The square root of 428646 is about 654.7106231000. The cubic root of 428646 is about 75.3991167545.

The spelling of 428646 in words is "four hundred twenty-eight thousand, six hundred forty-six".