Base | Representation |
---|---|
bin | 11010010010101011… |
… | …110101010110000000 |
3 | 2200212110011121100000 |
4 | 122102223311112000 |
5 | 430304034034000 |
6 | 20545151200000 |
7 | 2016404366031 |
oct | 322253652600 |
9 | 80773147300 |
10 | 28230768000 |
11 | 10a77594926 |
12 | 557a516000 |
13 | 287b988766 |
14 | 151b4a0a88 |
15 | b0364c000 |
hex | 692af5580 |
28230768000 has 768 divisors, whose sum is σ = 107904363840. Its totient is φ = 7332249600.
The previous prime is 28230767963. The next prime is 28230768001. The reversal of 28230768000 is 86703282.
It is a happy number.
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 (28230768001) by changing a digit.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 206063932 + ... + 206064068.
Almost surely, 228230768000 is an apocalyptic number.
28230768000 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 28230768000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53952181920).
28230768000 is an abundant number, since it is smaller than the sum of its proper divisors (79673595840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28230768000 is an equidigital number, since it uses as much as digits as its factorization.
28230768000 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 234 (or 200 counting only the distinct ones).
The product of its (nonzero) digits is 32256, while the sum is 36.
The spelling of 28230768000 in words is "twenty-eight billion, two hundred thirty million, seven hundred sixty-eight thousand".
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