Base | Representation |
---|---|
bin | 110001100001… |
… | …110110000000 |
3 | 220102122021001 |
4 | 301201312000 |
5 | 11310434210 |
6 | 1142141344 |
7 | 215234203 |
oct | 61416600 |
9 | 26378231 |
10 | 12983680 |
11 | 7368916 |
12 | 4421854 |
13 | 28c7968 |
14 | 1a1d93a |
15 | 121703a |
hex | c61d80 |
12983680 has 32 divisors (see below), whose sum is σ = 31040640. Its totient is φ = 5193216.
The previous prime is 12983657. The next prime is 12983681. The reversal of 12983680 is 8638921.
It is a tau number, because it is divible by the number of its divisors (32).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12983681) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9504 + ... + 10783.
It is an arithmetic number, because the mean of its divisors is an integer number (970020).
Almost surely, 212983680 is an apocalyptic number.
12983680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
12983680 is an abundant number, since it is smaller than the sum of its proper divisors (18056960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12983680 is an equidigital number, since it uses as much as digits as its factorization.
12983680 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 20306 (or 20294 counting only the distinct ones).
The product of its (nonzero) digits is 20736, while the sum is 37.
The square root of 12983680 is about 3603.2873879279. The cubic root of 12983680 is about 235.0350332560.
The spelling of 12983680 in words is "twelve million, nine hundred eighty-three thousand, six hundred eighty".
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