Base | Representation |
---|---|
bin | 10000100011110… |
… | …11011100111000 |
3 | 100200101202020120 |
4 | 20101323130320 |
5 | 241030331223 |
6 | 21441253240 |
7 | 3304531560 |
oct | 1021733470 |
9 | 320352216 |
10 | 138917688 |
11 | 71462a08 |
12 | 3a634220 |
13 | 22a1b820 |
14 | 14641da0 |
15 | c2e0be3 |
hex | 847b738 |
138917688 has 64 divisors (see below), whose sum is σ = 427445760. Its totient is φ = 36637056.
The previous prime is 138917687. The next prime is 138917699. The reversal of 138917688 is 886719831.
138917688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a self number, because there is not a number n which added to its sum of digits gives 138917688.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (138917687) 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, 29620 + ... + 33987.
It is an arithmetic number, because the mean of its divisors is an integer number (6678840).
Almost surely, 2138917688 is an apocalyptic number.
It is an amenable number.
138917688 is an abundant number, since it is smaller than the sum of its proper divisors (288528072).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138917688 is a wasteful number, since it uses less digits than its factorization.
138917688 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 63636 (or 63632 counting only the distinct ones).
The product of its digits is 580608, while the sum is 51.
The square root of 138917688 is about 11786.3347992495. The cubic root of 138917688 is about 517.9078760656.
The spelling of 138917688 in words is "one hundred thirty-eight million, nine hundred seventeen thousand, six hundred eighty-eight".
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