489918 has 32 divisors (see below), whose sum is σ = 1153152. Its totient is φ = 136800.

The previous prime is 489913. The next prime is 489941. The reversal of 489918 is 819984.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489911) by changing a digit.

489918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2⁴⁸⁹⁹¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576576).

489918 is an abundant number, since it is smaller than the sum of its proper divisors (663234).

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

489918 is a wasteful number, since it uses less digits than its factorization.

489918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600.

The product of its digits is 20736, while the sum is 39.

The square root of 489918 is about 699.9414261208. The cubic root of 489918 is about 78.8329536559.

The spelling of 489918 in words is "four hundred eighty-nine thousand, nine hundred eighteen".