489540 has 48 divisors (see below), whose sum is σ = 1411200. Its totient is φ = 126720.

The previous prime is 489539. The next prime is 489551. The reversal of 489540 is 45984.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 489498 and 489507.

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, 2361 + ... + 2559.

It is an arithmetic number, because the mean of its divisors is an integer number (29400).

2⁴⁸⁹⁵⁴⁰ 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 489540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705600).

489540 is an abundant number, since it is smaller than the sum of its proper divisors (921660).

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

489540 is a wasteful number, since it uses less digits than its factorization.

489540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 489540 is about 699.6713514215. The cubic root of 489540 is about 78.8126737154.

Subtracting from 489540 its reverse (45984), we obtain a square (443556 = 666²).

The spelling of 489540 in words is "four hundred eighty-nine thousand, five hundred forty".