Base | Representation |
---|---|
bin | 1000000100100001100100 |
3 | 10222111011200 |
4 | 20010201210 |
5 | 1020200214 |
6 | 113202500 |
7 | 23661114 |
oct | 10044144 |
9 | 3874150 |
10 | 2115684 |
11 | 12155aa |
12 | 860430 |
13 | 590cac |
14 | 3d1044 |
15 | 2bbd09 |
hex | 204864 |
2115684 has 36 divisors (see below), whose sum is σ = 5664204. Its totient is φ = 663552.
The previous prime is 2115683. The next prime is 2115689. The reversal of 2115684 is 4865112.
It can be written as a sum of positive squares in 2 ways, for example, as 675684 + 1440000 = 822^2 + 1200^2 .
It is a tau number, because it is divible by the number of its divisors (36).
It is a super-2 number, since 2×21156842 = 8952237575712, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2115683) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117 + ... + 2340.
It is an arithmetic number, because the mean of its divisors is an integer number (157339).
22115684 is an apocalyptic number.
It is an amenable number.
2115684 is an abundant number, since it is smaller than the sum of its proper divisors (3548520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2115684 is a wasteful number, since it uses less digits than its factorization.
2115684 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3484 (or 3479 counting only the distinct ones).
The product of its digits is 1920, while the sum is 27.
The square root of 2115684 is about 1454.5391022589. The cubic root of 2115684 is about 128.3759293394.
The spelling of 2115684 in words is "two million, one hundred fifteen thousand, six hundred eighty-four".
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