489718128 has 80 divisors (see below), whose sum is σ = 1318665600. Its totient is φ = 156414720.

The previous prime is 489718127. The next prime is 489718211. The reversal of 489718128 is 821817984.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489718121) 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, 192223 + ... + 194753.

It is an arithmetic number, because the mean of its divisors is an integer number (16483320).

Almost surely, 2^489718128 is an apocalyptic number.

489718128 is a gapful number since it is divisible by the number (48) 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 489718128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659332800).

489718128 is an abundant number, since it is smaller than the sum of its proper divisors (828947472).

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

489718128 is a wasteful number, since it uses less digits than its factorization.

489718128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2704 counting only the distinct ones).

The product of its digits is 258048, while the sum is 48.

The square root of 489718128 is about 22129.5758657955. The cubic root of 489718128 is about 788.2223169608. Note that the first 3 decimals are identical.

The spelling of 489718128 in words is "four hundred eighty-nine million, seven hundred eighteen thousand, one hundred twenty-eight".