Base | Representation |
---|---|
bin | 10111111001101001… |
… | …00110001100110100 |
3 | 1020010020212212000000 |
4 | 23330310212030310 |
5 | 202234341042410 |
6 | 5521133151300 |
7 | 632656432041 |
oct | 137464461464 |
9 | 36106785000 |
10 | 12831580980 |
11 | 5495102789 |
12 | 25a132b530 |
13 | 129652418a |
14 | 89a2481c8 |
15 | 501784dc0 |
hex | 2fcd26334 |
12831580980 has 336 divisors, whose sum is σ = 41964694464. Its totient is φ = 3292047360.
The previous prime is 12831580921. The next prime is 12831580987. The reversal of 12831580980 is 8908513821.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12831580987) by changing a digit.
It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 60813075 + ... + 60813285.
It is an arithmetic number, because the mean of its divisors is an integer number (124894924).
Almost surely, 212831580980 is an apocalyptic number.
12831580980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12831580980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20982347232).
12831580980 is an abundant number, since it is smaller than the sum of its proper divisors (29133113484).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12831580980 is a wasteful number, since it uses less digits than its factorization.
12831580980 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 378 (or 361 counting only the distinct ones).
The product of its (nonzero) digits is 138240, while the sum is 45.
The spelling of 12831580980 in words is "twelve billion, eight hundred thirty-one million, five hundred eighty thousand, nine hundred eighty".
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