489839985 has 24 divisors (see below), whose sum is σ = 853977384. Its totient is φ = 259733760.

The previous prime is 489839981. The next prime is 489840019. The reversal of 489839985 is 589938984.

It can be written as a sum of positive squares in 4 ways, for example, as 160199649 + 329640336 = 12657^2 + 18156^2 .

It is not a de Polignac number, because 489839985 - 2² = 489839981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (489839981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23676 + ... + 39245.

It is an arithmetic number, because the mean of its divisors is an integer number (35582391).

Almost surely, 2^489839985 is an apocalyptic number.

489839985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

489839985 is a deficient number, since it is larger than the sum of its proper divisors (364137399).

489839985 is a wasteful number, since it uses less digits than its factorization.

489839985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63105 (or 63102 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The square root of 489839985 is about 22132.3289556251. The cubic root of 489839985 is about 788.2876895603.

The spelling of 489839985 in words is "four hundred eighty-nine million, eight hundred thirty-nine thousand, nine hundred eighty-five".