284909889 has 8 divisors (see below), whose sum is σ = 414414432. Its totient is φ = 172672640.

The previous prime is 284909887. The next prime is 284909897. The reversal of 284909889 is 988909482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 284909889 - 2¹ = 284909887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (284909887) 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 7 ways as a sum of consecutive naturals, for example, 4316784 + ... + 4316849.

It is an arithmetic number, because the mean of its divisors is an integer number (51801804).

Almost surely, 2^284909889 is an apocalyptic number.

It is an amenable number.

284909889 is a deficient number, since it is larger than the sum of its proper divisors (129504543).

284909889 is a wasteful number, since it uses less digits than its factorization.

284909889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633647.

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 284909889 is about 16879.2739476555. The cubic root of 284909889 is about 658.0150717316.

The spelling of 284909889 in words is "two hundred eighty-four million, nine hundred nine thousand, eight hundred eighty-nine".