489940 has 48 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 166400.

The previous prime is 489913. The next prime is 489941. The reversal of 489940 is 49984.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 489896 and 489905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489941) by changing a digit.

489940 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, 3675 + ... + 3805.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2⁴⁸⁹⁹⁴⁰ 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 489940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598752).

489940 is an abundant number, since it is smaller than the sum of its proper divisors (707564).

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

489940 is a wasteful number, since it uses less digits than its factorization.

489940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 489940 is about 699.9571415451. The cubic root of 489940 is about 78.8341336486.

The spelling of 489940 in words is "four hundred eighty-nine thousand, nine hundred forty".