284428856 has 16 divisors (see below), whose sum is σ = 556491600. Its totient is φ = 136031104.

The previous prime is 284428829. The next prime is 284428861. The reversal of 284428856 is 658824482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 284428856.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772721 + ... + 773088.

It is an arithmetic number, because the mean of its divisors is an integer number (34780725).

Almost surely, 2^284428856 is an apocalyptic number.

It is an amenable number.

284428856 is a deficient number, since it is larger than the sum of its proper divisors (272062744).

284428856 is a wasteful number, since it uses less digits than its factorization.

284428856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545838 (or 1545834 counting only the distinct ones).

The product of its digits is 983040, while the sum is 47.

The square root of 284428856 is about 16865.0187073718. The cubic root of 284428856 is about 657.6445390572.

The spelling of 284428856 in words is "two hundred eighty-four million, four hundred twenty-eight thousand, eight hundred fifty-six".