284428907 has 4 divisors (see below), whose sum is σ = 325061616. Its totient is φ = 243796200.

The previous prime is 284428901. The next prime is 284428919. The reversal of 284428907 is 709824482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 284428907 - 2⁴ = 284428891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284428901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20316344 + ... + 20316357.

It is an arithmetic number, because the mean of its divisors is an integer number (81265404).

Almost surely, 2^284428907 is an apocalyptic number.

284428907 is a deficient number, since it is larger than the sum of its proper divisors (40632709).

284428907 is an equidigital number, since it uses as much as digits as its factorization.

284428907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40632708.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 284428907 is about 16865.0202193771. The cubic root of 284428907 is about 657.6445783639.

The spelling of 284428907 in words is "two hundred eighty-four million, four hundred twenty-eight thousand, nine hundred seven".