Base | Representation |
---|---|
bin | 10010100001100… |
… | …00001000010011 |
3 | 101211101110001101 |
4 | 21100300020103 |
5 | 304234331022 |
6 | 23230245231 |
7 | 3564522352 |
oct | 1120601023 |
9 | 354343041 |
10 | 155386387 |
11 | 7a791102 |
12 | 44056817 |
13 | 26266810 |
14 | 168cb999 |
15 | d995627 |
hex | 9430213 |
155386387 has 8 divisors (see below), whose sum is σ = 167438880. Its totient is φ = 143348160.
The previous prime is 155386381. The next prime is 155386403. The reversal of 155386387 is 783683551.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-155386387 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (155386381) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33039 + ... + 37447.
It is an arithmetic number, because the mean of its divisors is an integer number (20929860).
Almost surely, 2155386387 is an apocalyptic number.
155386387 is a deficient number, since it is larger than the sum of its proper divisors (12052493).
155386387 is a wasteful number, since it uses less digits than its factorization.
155386387 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7133.
The product of its digits is 604800, while the sum is 46.
The square root of 155386387 is about 12465.4076146751. The cubic root of 155386387 is about 537.6145198208.
The spelling of 155386387 in words is "one hundred fifty-five million, three hundred eighty-six thousand, three hundred eighty-seven".
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