| Base | Representation |
|---|---|
| bin | 10000101001001… |
| … | …00011000100110 |
| 3 | 100201200220102100 |
| 4 | 20110210120212 |
| 5 | 241220002023 |
| 6 | 21504152530 |
| 7 | 3313443120 |
| oct | 1024443046 |
| 9 | 321626370 |
| 10 | 139609638 |
| 11 | 71895873 |
| 12 | 3a908746 |
| 13 | 22c0176c |
| 14 | 14782210 |
| 15 | c3cac43 |
| hex | 8524626 |
139609638 has 48 divisors (see below), whose sum is σ = 347551776. Its totient is φ = 39674880.
The previous prime is 139609637. The next prime is 139609649. The reversal of 139609638 is 836906931.
139609638 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 0 + 9 + 638 = 666.
It is a super-3 number, since 3×1396096383 (a number of 25 digits) contains 333 as substring.
It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 139609593 and 139609602.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (139609637) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21448 + ... + 27188.
It is an arithmetic number, because the mean of its divisors is an integer number (7240662).
Almost surely, 2139609638 is an apocalyptic number.
139609638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 139609638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173775888).
139609638 is an abundant number, since it is smaller than the sum of its proper divisors (207942138).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
139609638 is a wasteful number, since it uses less digits than its factorization.
139609638 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5949 (or 5946 counting only the distinct ones).
The product of its (nonzero) digits is 209952, while the sum is 45.
The square root of 139609638 is about 11815.6522460675. The cubic root of 139609638 is about 518.7663532272.
The spelling of 139609638 in words is "one hundred thirty-nine million, six hundred nine thousand, six hundred thirty-eight".
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