| Base | Representation |
|---|---|
| bin | 10000100001101… |
| … | …11111101101000 |
| 3 | 100122212201001100 |
| 4 | 20100313331220 |
| 5 | 240443010011 |
| 6 | 21431321400 |
| 7 | 3302300625 |
| oct | 1020677550 |
| 9 | 318781040 |
| 10 | 138641256 |
| 11 | 71294256 |
| 12 | 3a520260 |
| 13 | 22952a60 |
| 14 | 145ad34c |
| 15 | c288d56 |
| hex | 8437f68 |
138641256 has 96 divisors (see below), whose sum is σ = 428205960. Its totient is φ = 40144896.
The previous prime is 138641231. The next prime is 138641267. The reversal of 138641256 is 652146831.
It is a happy number.
138641256 is a `hidden beast` number, since 1 + 3 + 8 + 641 + 2 + 5 + 6 = 666.
138641256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 4 ways, for example, as 136188900 + 2452356 = 11670^2 + 1566^2 .
It is a hoax number, since the sum of its digits (36) 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 (36).
It is a self number, because there is not a number n which added to its sum of digits gives 138641256.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11556 + ... + 20268.
Almost surely, 2138641256 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 138641256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214102980).
138641256 is an abundant number, since it is smaller than the sum of its proper divisors (289564704).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138641256 is a wasteful number, since it uses less digits than its factorization.
138641256 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8755 (or 8748 counting only the distinct ones).
The product of its digits is 34560, while the sum is 36.
The square root of 138641256 is about 11774.6021588842. The cubic root of 138641256 is about 517.5641200393.
The spelling of 138641256 in words is "one hundred thirty-eight million, six hundred forty-one thousand, two hundred fifty-six".
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