Base | Representation |
---|---|
bin | 101001000001110… |
… | …100101101001110 |
3 | 1202222020111022000 |
4 | 221001310231032 |
5 | 2402204001021 |
6 | 152145333130 |
7 | 23025553326 |
oct | 5101645516 |
9 | 1688214260 |
10 | 688343886 |
11 | 323608a4a |
12 | 1726371a6 |
13 | ac7baa99 |
14 | 675c2286 |
15 | 4066db26 |
hex | 29074b4e |
688343886 has 64 divisors (see below), whose sum is σ = 1570881600. Its totient is φ = 223344000.
The previous prime is 688343867. The next prime is 688343897.
It is a happy number.
688343886 is nontrivially palindromic in base 10.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331660 + ... + 333728.
It is an arithmetic number, because the mean of its divisors is an integer number (24545025).
Almost surely, 2688343886 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 688343886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785440800).
688343886 is an abundant number, since it is smaller than the sum of its proper divisors (882537714).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
688343886 is a wasteful number, since it uses less digits than its factorization.
688343886 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2242 (or 2236 counting only the distinct ones).
The product of its digits is 5308416, while the sum is 54.
The square root of 688343886 is about 26236.3085436957. The cubic root of 688343886 is about 882.9480527286.
The spelling of 688343886 in words is "six hundred eighty-eight million, three hundred forty-three thousand, eight hundred eighty-six".
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