489831 has 16 divisors (see below), whose sum is σ = 706560. Its totient is φ = 300960.

The previous prime is 489823. The next prime is 489833. The reversal of 489831 is 138984.

It is not a de Polignac number, because 489831 - 2³ = 489823 is a prime.

It is a super-2 number, since 2×489831² = 479868817122, which contains 22 as substring.

489831 is a lucky number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 489792 and 489801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2025 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (44160).

2⁴⁸⁹⁸³¹ is an apocalyptic number.

489831 is a deficient number, since it is larger than the sum of its proper divisors (216729).

489831 is a wasteful number, since it uses less digits than its factorization.

489831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 6912, while the sum is 33.

The square root of 489831 is about 699.8792753040. The cubic root of 489831 is about 78.8282869750.

It can be divided in two parts, 48983 and 1, that added together give a palindrome (48984).

The spelling of 489831 in words is "four hundred eighty-nine thousand, eight hundred thirty-one".