428684 has 6 divisors (see below), whose sum is σ = 750204. Its totient is φ = 214340.

The previous prime is 428683. The next prime is 428693. The reversal of 428684 is 486824.

It is a self number, because there is not a number n which added to its sum of digits gives 428684.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428684.

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 as a sum of consecutive naturals, namely, 53582 + ... + 53589.

It is an arithmetic number, because the mean of its divisors is an integer number (125034).

2⁴²⁸⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

428684 is a deficient number, since it is larger than the sum of its proper divisors (321520).

428684 is a wasteful number, since it uses less digits than its factorization.

428684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107175 (or 107173 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 428684 is about 654.7396429116. The cubic root of 428684 is about 75.4013447637.

The spelling of 428684 in words is "four hundred twenty-eight thousand, six hundred eighty-four".