Base | Representation |
---|---|
bin | 10100111110101100100 |
3 | 1021221000111 |
4 | 2213311210 |
5 | 133444320 |
6 | 22422404 |
7 | 5562154 |
oct | 2476544 |
9 | 1257014 |
10 | 687460 |
11 | 42a554 |
12 | 291a04 |
13 | 1b0ba7 |
14 | 13c764 |
15 | d8a5a |
hex | a7d64 |
687460 has 24 divisors (see below), whose sum is σ = 1484280. Its totient is φ = 267264.
The previous prime is 687457. The next prime is 687461. The reversal of 687460 is 64786.
It can be written as a sum of positive squares in 4 ways, for example, as 34596 + 652864 = 186^2 + 808^2 .
It is not an unprimeable number, because it can be changed into a prime (687461) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276 + ... + 1204.
It is an arithmetic number, because the mean of its divisors is an integer number (61845).
2687460 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 687460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742140).
687460 is an abundant number, since it is smaller than the sum of its proper divisors (796820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
687460 is a wasteful number, since it uses less digits than its factorization.
687460 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 975 (or 973 counting only the distinct ones).
The product of its (nonzero) digits is 8064, while the sum is 31.
The square root of 687460 is about 829.1320763304. The cubic root of 687460 is about 88.2569966659.
The spelling of 687460 in words is "six hundred eighty-seven thousand, four hundred sixty".
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