489820728 has 64 divisors (see below), whose sum is σ = 1317906720. Its totient is φ = 151142400.

The previous prime is 489820717. The next prime is 489820733. The reversal of 489820728 is 827028984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15048 + ... + 34728.

Almost surely, 2^489820728 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 489820728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658953360).

489820728 is an abundant number, since it is smaller than the sum of its proper divisors (828085992).

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

489820728 is a wasteful number, since it uses less digits than its factorization.

489820728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19768 (or 19764 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 489820728 is about 22131.8939090174. The cubic root of 489820728 is about 788.2773594829.

The spelling of 489820728 in words is "four hundred eighty-nine million, eight hundred twenty thousand, seven hundred twenty-eight".