489851520 has 128 divisors (see below), whose sum is σ = 1577197440. Its totient is φ = 129306624.

The previous prime is 489851519. The next prime is 489851543. The reversal of 489851520 is 25158984.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 196522 + ... + 198998.

It is an arithmetic number, because the mean of its divisors is an integer number (12321855).

Almost surely, 2^489851520 is an apocalyptic number.

489851520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489851520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788598720).

489851520 is an abundant number, since it is smaller than the sum of its proper divisors (1087345920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489851520 is a wasteful number, since it uses less digits than its factorization.

489851520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602 (or 2590 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 489851520 is about 22132.5895457355. The cubic root of 489851520 is about 788.2938771777.

It can be divided in two parts, 48985 and 1520, that added together give a palindrome (50505).

The spelling of 489851520 in words is "four hundred eighty-nine million, eight hundred fifty-one thousand, five hundred twenty".