| Base | Representation |
|---|---|
| bin | 10011110001011… |
| … | …11001000000110 |
| 3 | 102120002222011200 |
| 4 | 21320233020012 |
| 5 | 314430234123 |
| 6 | 24243043330 |
| 7 | 4052566200 |
| oct | 1170571006 |
| 9 | 376088150 |
| 10 | 165868038 |
| 11 | 856a0126 |
| 12 | 47670546 |
| 13 | 2849668b |
| 14 | 18059770 |
| 15 | e866143 |
| hex | 9e2f206 |
165868038 has 72 divisors (see below), whose sum is σ = 420769440. Its totient is φ = 47083680.
The previous prime is 165868033. The next prime is 165868039. The reversal of 165868038 is 830868561.
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 = 165867984 and 165868002.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (165868033) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 159123 + ... + 160161.
It is an arithmetic number, because the mean of its divisors is an integer number (5844020).
Almost surely, 2165868038 is an apocalyptic number.
165868038 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 165868038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210384720).
165868038 is an abundant number, since it is smaller than the sum of its proper divisors (254901402).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
165868038 is a wasteful number, since it uses less digits than its factorization.
165868038 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1242 (or 1232 counting only the distinct ones).
The product of its (nonzero) digits is 276480, while the sum is 45.
The square root of 165868038 is about 12878.9765897761. The cubic root of 165868038 is about 549.4407958176.
It can be divided in two parts, 1658 and 68038, that added together give a palindrome (69696).
The spelling of 165868038 in words is "one hundred sixty-five million, eight hundred sixty-eight thousand, thirty-eight".
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