Base | Representation |
---|---|
bin | 100110101110101… |
… | …111011111110100 |
3 | 1200021200121201021 |
4 | 212232233133310 |
5 | 2312321144010 |
6 | 144251110524 |
7 | 22050046564 |
oct | 4656573764 |
9 | 1607617637 |
10 | 649787380 |
11 | 303873970 |
12 | 161742444 |
13 | a480b298 |
14 | 62426da4 |
15 | 3c0a48da |
hex | 26baf7f4 |
649787380 has 48 divisors (see below), whose sum is σ = 1491327936. Its totient is φ = 235854080.
The previous prime is 649787357. The next prime is 649787387. The reversal of 649787380 is 83787946.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (649787387) 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, 133347 + ... + 138133.
It is an arithmetic number, because the mean of its divisors is an integer number (31069332).
Almost surely, 2649787380 is an apocalyptic number.
It is an amenable number.
649787380 is an abundant number, since it is smaller than the sum of its proper divisors (841540556).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
649787380 is a wasteful number, since it uses less digits than its factorization.
649787380 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5424 (or 5422 counting only the distinct ones).
The product of its (nonzero) digits is 2032128, while the sum is 52.
The square root of 649787380 is about 25490.9274056477. The cubic root of 649787380 is about 866.1446438822.
The spelling of 649787380 in words is "six hundred forty-nine million, seven hundred eighty-seven thousand, three hundred eighty".
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