| Base | Representation |
|---|---|
| bin | 11101000000001… |
| … | …00010011110000 |
| 3 | 121221210021102000 |
| 4 | 32200010103300 |
| 5 | 444240143110 |
| 6 | 40050254000 |
| 7 | 6012623235 |
| oct | 1640042360 |
| 9 | 557707360 |
| 10 | 243287280 |
| 11 | 115369375 |
| 12 | 69587300 |
| 13 | 3b532192 |
| 14 | 2444d78c |
| 15 | 1655a1c0 |
| hex | e8044f0 |
243287280 has 160 divisors (see below), whose sum is σ = 844350720. Its totient is φ = 64385280.
The previous prime is 243287279. The next prime is 243287281. The reversal of 243287280 is 82782342.
243287280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (243287279) and next prime (243287281).
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 congruent number.
It is not an unprimeable number, because it can be changed into a prime (243287281) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351735 + ... + 352425.
It is an arithmetic number, because the mean of its divisors is an integer number (5277192).
Almost surely, 2243287280 is an apocalyptic number.
243287280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 243287280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422175360).
243287280 is an abundant number, since it is smaller than the sum of its proper divisors (601063440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
243287280 is a wasteful number, since it uses less digits than its factorization.
243287280 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 876 (or 864 counting only the distinct ones).
The product of its (nonzero) digits is 43008, while the sum is 36.
The square root of 243287280 is about 15597.6690566251. The cubic root of 243287280 is about 624.2709622035.
The spelling of 243287280 in words is "two hundred forty-three million, two hundred eighty-seven thousand, two hundred eighty".
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