| Base | Representation |
|---|---|
| bin | 11000111011001… |
| … | …01010000100000 |
| 3 | 112120102102201200 |
| 4 | 30131211100200 |
| 5 | 412011101001 |
| 6 | 32425201200 |
| 7 | 5116106460 |
| oct | 1435452040 |
| 9 | 476372650 |
| 10 | 209081376 |
| 11 | a8025a29 |
| 12 | 5a030200 |
| 13 | 344169ba |
| 14 | 1daa7ba0 |
| 15 | 13550086 |
| hex | c765420 |
209081376 has 144 divisors (see below), whose sum is σ = 698128704. Its totient is φ = 58102272.
The previous prime is 209081359. The next prime is 209081423. The reversal of 209081376 is 673180902.
209081376 is a `hidden beast` number, since 209 + 0 + 81 + 376 = 666.
209081376 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (144).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a nialpdrome in base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 209081376.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73191 + ... + 75993.
It is an arithmetic number, because the mean of its divisors is an integer number (4848116).
Almost surely, 2209081376 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 209081376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349064352).
209081376 is an abundant number, since it is smaller than the sum of its proper divisors (489047328).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
209081376 is a wasteful number, since it uses less digits than its factorization.
209081376 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2863 (or 2852 counting only the distinct ones).
The product of its (nonzero) digits is 18144, while the sum is 36.
The square root of 209081376 is about 14459.6464687073. The cubic root of 209081376 is about 593.5242253544.
The spelling of 209081376 in words is "two hundred nine million, eighty-one thousand, three hundred seventy-six".
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