Base | Representation |
---|---|
bin | 10111000100111110… |
… | …01111001101000100 |
3 | 1011222110112201222000 |
4 | 23202133033031010 |
5 | 200333240233043 |
6 | 5405231505300 |
7 | 616013225343 |
oct | 134237171504 |
9 | 34873481860 |
10 | 12389774148 |
11 | 5288782774 |
12 | 2499388230 |
13 | 1225b3580b |
14 | 8576bdb5a |
15 | 4c7ab42d3 |
hex | 2e27cf344 |
12389774148 has 96 divisors (see below), whose sum is σ = 34587907200. Its totient is φ = 3821073408.
The previous prime is 12389774141. The next prime is 12389774167. The reversal of 12389774148 is 84147798321.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a junction number, because it is equal to n+sod(n) for n = 12389774094 and 12389774103.
It is not an unprimeable number, because it can be changed into a prime (12389774141) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51136 + ... + 165512.
It is an arithmetic number, because the mean of its divisors is an integer number (360290700).
Almost surely, 212389774148 is an apocalyptic number.
12389774148 is a gapful number since it is divisible by the number (18) 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 12389774148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17293953600).
12389774148 is an abundant number, since it is smaller than the sum of its proper divisors (22198133052).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12389774148 is a wasteful number, since it uses less digits than its factorization.
12389774148 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 114466 (or 114458 counting only the distinct ones).
The product of its digits is 2709504, while the sum is 54.
The spelling of 12389774148 in words is "twelve billion, three hundred eighty-nine million, seven hundred seventy-four thousand, one hundred forty-eight".
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