489444864 has 160 divisors (see below), whose sum is σ = 1419432960. Its totient is φ = 149299200.

The previous prime is 489444859. The next prime is 489444911. The reversal of 489444864 is 468444984.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 904434 + ... + 904974.

It is an arithmetic number, because the mean of its divisors is an integer number (8871456).

Almost surely, 2^489444864 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 489444864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709716480).

489444864 is an abundant number, since it is smaller than the sum of its proper divisors (929988096).

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

489444864 is a wasteful number, since it uses less digits than its factorization.

489444864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 596 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 51.

The square root of 489444864 is about 22123.4008235624. The cubic root of 489444864 is about 788.0756796426.

The spelling of 489444864 in words is "four hundred eighty-nine million, four hundred forty-four thousand, eight hundred sixty-four".