Base | Representation |
---|---|
bin | 1111010100001… |
… | …11011010001011 |
3 | 22221202111200010 |
4 | 13222013122023 |
5 | 230342342112 |
6 | 20425443003 |
7 | 3120032622 |
oct | 752073213 |
9 | 287674603 |
10 | 128480907 |
11 | 66584675 |
12 | 37040463 |
13 | 20806209 |
14 | 130c66b9 |
15 | b42d63c |
hex | 7a8768b |
128480907 has 16 divisors (see below), whose sum is σ = 180608000. Its totient is φ = 81018144.
The previous prime is 128480881. The next prime is 128480923. The reversal of 128480907 is 709084821.
It is not a de Polignac number, because 128480907 - 212 = 128476811 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (128480927) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45894 + ... + 48612.
It is an arithmetic number, because the mean of its divisors is an integer number (11288000).
Almost surely, 2128480907 is an apocalyptic number.
128480907 is a deficient number, since it is larger than the sum of its proper divisors (52127093).
128480907 is a wasteful number, since it uses less digits than its factorization.
128480907 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3570.
The product of its (nonzero) digits is 32256, while the sum is 39.
The square root of 128480907 is about 11334.9418613419. The cubic root of 128480907 is about 504.5987820621.
The spelling of 128480907 in words is "one hundred twenty-eight million, four hundred eighty thousand, nine hundred seven".
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