Base | Representation |
---|---|
bin | 101000100111001110… |
… | …1100110110110100000 |
3 | 22100010012210010211012 |
4 | 1101032131212312200 |
5 | 2412104211330310 |
6 | 104022155440052 |
7 | 6205200321353 |
oct | 1211635466640 |
9 | 270105703735 |
10 | 87215730080 |
11 | 33a96007976 |
12 | 14aa0456028 |
13 | 82bc041a9b |
14 | 431521029a |
15 | 2406becc05 |
hex | 144e766da0 |
87215730080 has 48 divisors (see below), whose sum is σ = 208087271784. Its totient is φ = 34540876800.
The previous prime is 87215730061. The next prime is 87215730103. The reversal of 87215730080 is 8003751278.
It can be written as a sum of positive squares in 4 ways, for example, as 84083760784 + 3131969296 = 289972^2 + 55964^2 .
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, 2682347 + ... + 2714666.
Almost surely, 287215730080 is an apocalyptic number.
87215730080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.
It is an amenable number.
87215730080 is an abundant number, since it is smaller than the sum of its proper divisors (120871541704).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
87215730080 is a wasteful number, since it uses less digits than its factorization.
87215730080 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5397129 (or 5397121 counting only the distinct ones).
The product of its (nonzero) digits is 94080, while the sum is 41.
The spelling of 87215730080 in words is "eighty-seven billion, two hundred fifteen million, seven hundred thirty thousand, eighty".
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