489505920 has 128 divisors (see below), whose sum is σ = 1575288000. Its totient is φ = 129282048.

The previous prime is 489505909. The next prime is 489505921. The reversal of 489505920 is 29505984.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489505921) by changing a digit.

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, 208111 + ... + 210449.

Almost surely, 2^489505920 is an apocalyptic number.

489505920 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 489505920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787644000).

489505920 is an abundant number, since it is smaller than the sum of its proper divisors (1085782080).

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

489505920 is a wasteful number, since it uses less digits than its factorization.

489505920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 489505920 is about 22124.7806768790. The cubic root of 489505920 is about 788.1084478879.

The spelling of 489505920 in words is "four hundred eighty-nine million, five hundred five thousand, nine hundred twenty".