Base | Representation |
---|---|
bin | 1011010011101101110… |
… | …11001011011001001000 |
3 | 1101010220011211221201112 |
4 | 11221312323023121020 |
5 | 22331213311000123 |
6 | 454254401305452 |
7 | 40033303620200 |
oct | 5516673133110 |
9 | 1333804757645 |
10 | 388542281288 |
11 | 13a863a96787 |
12 | 63376035288 |
13 | 2a840943925 |
14 | 14b3c5c5400 |
15 | a190a93d78 |
hex | 5a76ecb648 |
388542281288 has 108 divisors (see below), whose sum is σ = 894948991785. Its totient is φ = 157658804352.
The previous prime is 388542281279. The next prime is 388542281293. The reversal of 388542281288 is 882182245883.
It is a happy number.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 375276309604 + 13265971684 = 612598^2 + 115178^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=440762.
It is an unprimeable number.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 234484556 + ... + 234486212.
Almost surely, 2388542281288 is an apocalyptic number.
388542281288 is a gapful number since it is divisible by the number (38) 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 388542281288
388542281288 is an abundant number, since it is smaller than the sum of its proper divisors (506406710497).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
388542281288 is an equidigital number, since it uses as much as digits as its factorization.
388542281288 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3372 (or 1685 counting only the distinct ones).
The product of its digits is 15728640, while the sum is 59.
The spelling of 388542281288 in words is "three hundred eighty-eight billion, five hundred forty-two million, two hundred eighty-one thousand, two hundred eighty-eight".
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