284638989 has 8 divisors (see below), whose sum is σ = 379596672. Its totient is φ = 189720320.

The previous prime is 284638987. The next prime is 284639101. The reversal of 284638989 is 989836482.

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 284638989 - 2¹ = 284638987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284638987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22732 + ... + 32954.

It is an arithmetic number, because the mean of its divisors is an integer number (47449584).

Almost surely, 2^284638989 is an apocalyptic number.

It is an amenable number.

284638989 is a deficient number, since it is larger than the sum of its proper divisors (94957683).

284638989 is a wasteful number, since it uses less digits than its factorization.

284638989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19507.

The product of its digits is 5971968, while the sum is 57.

The square root of 284638989 is about 16871.2474049787. The cubic root of 284638989 is about 657.8064527768.

The spelling of 284638989 in words is "two hundred eighty-four million, six hundred thirty-eight thousand, nine hundred eighty-nine".