489845 has 6 divisors (see below), whose sum is σ = 589698. Its totient is φ = 390624.

The previous prime is 489833. The next prime is 489847. The reversal of 489845 is 548984.

It can be written as a sum of positive squares in 3 ways, for example, as 68644 + 421201 = 262^2 + 649^2 .

It is not a de Polignac number, because 489845 - 2¹⁰ = 488821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 489799 and 489808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489847) 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 5 ways as a sum of consecutive naturals, for example, 1409 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (98283).

2⁴⁸⁹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

489845 is a deficient number, since it is larger than the sum of its proper divisors (99853).

489845 is an frugal number, since it uses more digits than its factorization.

489845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 318 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 489845 is about 699.8892769574. The cubic root of 489845 is about 78.8290379724.

Multiplying 489845 by its product of digits (46080), we get a square (22572057600 = 150240²).

The spelling of 489845 in words is "four hundred eighty-nine thousand, eight hundred forty-five".