284728 has 8 divisors (see below), whose sum is σ = 533880. Its totient is φ = 142360.

The previous prime is 284723. The next prime is 284729. The reversal of 284728 is 827482.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 284728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284723) 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 as a sum of consecutive naturals, namely, 17788 + ... + 17803.

It is an arithmetic number, because the mean of its divisors is an integer number (66735).

2²⁸⁴⁷²⁸ is an apocalyptic number.

It is an amenable number.

284728 is a deficient number, since it is larger than the sum of its proper divisors (249152).

284728 is a wasteful number, since it uses less digits than its factorization.

284728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35597 (or 35593 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 284728 is about 533.5991004490. The cubic root of 284728 is about 65.7875014370.

The spelling of 284728 in words is "two hundred eighty-four thousand, seven hundred twenty-eight".