Base | Representation |
---|---|
bin | 10111000100011011… |
… | …10010101001010000 |
3 | 1011222010221101101210 |
4 | 23202031302221100 |
5 | 200331102410340 |
6 | 5404545500120 |
7 | 615626316624 |
oct | 134215625120 |
9 | 34863841353 |
10 | 12385200720 |
11 | 5286139682 |
12 | 2497941640 |
13 | 1224bc3c49 |
14 | 856c4d184 |
15 | 4c74ae180 |
hex | 2e2372a50 |
12385200720 has 40 divisors (see below), whose sum is σ = 38394122976. Its totient is φ = 3302720128.
The previous prime is 12385200713. The next prime is 12385200731. The reversal of 12385200720 is 2700258321.
It is a tau number, because it is divible by the number of its divisors (40).
It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25802262 + ... + 25802741.
Almost surely, 212385200720 is an apocalyptic number.
12385200720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
12385200720 is an abundant number, since it is smaller than the sum of its proper divisors (26008922256).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12385200720 is a wasteful number, since it uses less digits than its factorization.
12385200720 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 51605019 (or 51605013 counting only the distinct ones).
The product of its (nonzero) digits is 6720, while the sum is 30.
The spelling of 12385200720 in words is "twelve billion, three hundred eighty-five million, two hundred thousand, seven hundred twenty".
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