489864 has 16 divisors (see below), whose sum is σ = 1224720. Its totient is φ = 163280.

The previous prime is 489851. The next prime is 489869. The reversal of 489864 is 468984.

489864 is nontrivially palindromic in base 7.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (489869) by changing a digit.

489864 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 3 ways as a sum of consecutive naturals, for example, 10182 + ... + 10229.

It is an arithmetic number, because the mean of its divisors is an integer number (76545).

2⁴⁸⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

489864 is an abundant number, since it is smaller than the sum of its proper divisors (734856).

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

489864 is a wasteful number, since it uses less digits than its factorization.

489864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420 (or 20416 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 489864 is about 699.9028504014. The cubic root of 489864 is about 78.8300571604.

The spelling of 489864 in words is "four hundred eighty-nine thousand, eight hundred sixty-four".