489721856 has 104 divisors (see below), whose sum is σ = 1118759544. Its totient is φ = 212336640.

The previous prime is 489721853. The next prime is 489721871. The reversal of 489721856 is 658127984.

It can be written as a sum of positive squares in 4 ways, for example, as 40960000 + 448761856 = 6400^2 + 21184^2 .

It is a tau number, because it is divible by the number of its divisors (104).

It is not an unprimeable number, because it can be changed into a prime (489721853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904946 + ... + 905486.

Almost surely, 2^489721856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559379772).

489721856 is an abundant number, since it is smaller than the sum of its proper divisors (629037688).

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

489721856 is a wasteful number, since it uses less digits than its factorization.

489721856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 573 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 489721856 is about 22129.6600968022. The cubic root of 489721856 is about 788.2243170810.

The spelling of 489721856 in words is "four hundred eighty-nine million, seven hundred twenty-one thousand, eight hundred fifty-six".