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489845 = 53132
BaseRepresentation
bin1110111100101110101
3220212221102
41313211311
5111133340
614255445
74110056
oct1674565
9825842
10489845
11305034
121b7585
13141c65
14ca72d
159a215
hex77975

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".

Divisors: 1 5 313 1565 97969 489845