489979985 has 8 divisors (see below), whose sum is σ = 641428416. Its totient is φ = 356349040.

The previous prime is 489979979. The next prime is 489979991. The reversal of 489979985 is 589979984.

It is an interprime number because it is at equal distance from previous prime (489979979) and next prime (489979991).

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

It is not a de Polignac number, because 489979985 - 2⁶ = 489979921 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 4454309 + ... + 4454418.

It is an arithmetic number, because the mean of its divisors is an integer number (80178552).

Almost surely, 2^489979985 is an apocalyptic number.

It is an amenable number.

489979985 is a deficient number, since it is larger than the sum of its proper divisors (151448431).

489979985 is a wasteful number, since it uses less digits than its factorization.

489979985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8908743.

The product of its digits is 58786560, while the sum is 68.

The square root of 489979985 is about 22135.4915237950. The cubic root of 489979985 is about 788.3627819495.

Subtracting 489979985 from its reverse (589979984), we obtain a palindrome (99999999).

The spelling of 489979985 in words is "four hundred eighty-nine million, nine hundred seventy-nine thousand, nine hundred eighty-five".