489670728 has 64 divisors (see below), whose sum is σ = 1269048000. Its totient is φ = 157324032.

The previous prime is 489670721. The next prime is 489670733. The reversal of 489670728 is 827076984.

It is not an unprimeable number, because it can be changed into a prime (489670721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94263 + ... + 99321.

It is an arithmetic number, because the mean of its divisors is an integer number (19828875).

Almost surely, 2^489670728 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 489670728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (634524000).

489670728 is an abundant number, since it is smaller than the sum of its proper divisors (779377272).

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

489670728 is a wasteful number, since it uses less digits than its factorization.

489670728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214 (or 5210 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 489670728 is about 22128.5048749345. The cubic root of 489670728 is about 788.1968853631.

The spelling of 489670728 in words is "four hundred eighty-nine million, six hundred seventy thousand, seven hundred twenty-eight".