Base | Representation |
---|---|
bin | 10000011100111… |
… | …01100001110000 |
3 | 100121200120022220 |
4 | 20032131201300 |
5 | 240312234223 |
6 | 21410001040 |
7 | 3264024456 |
oct | 1016354160 |
9 | 317616286 |
10 | 138008688 |
11 | 709a1a74 |
12 | 3a276180 |
13 | 22790b5c |
14 | 144869d6 |
15 | c1b16e3 |
hex | 839d870 |
138008688 has 40 divisors (see below), whose sum is σ = 357500928. Its totient is φ = 45876672.
The previous prime is 138008687. The next prime is 138008693. The reversal of 138008688 is 886800831.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (138008687) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14631 + ... + 22137.
Almost surely, 2138008688 is an apocalyptic number.
It is an amenable number.
138008688 is an abundant number, since it is smaller than the sum of its proper divisors (219492240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138008688 is a wasteful number, since it uses less digits than its factorization.
138008688 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7901 (or 7895 counting only the distinct ones).
The product of its (nonzero) digits is 73728, while the sum is 42.
The square root of 138008688 is about 11747.7099044878. The cubic root of 138008688 is about 516.7757695829.
The spelling of 138008688 in words is "one hundred thirty-eight million, eight thousand, six hundred eighty-eight".
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