Base | Representation |
---|---|
bin | 1111010000100… |
… | …10000000001000 |
3 | 22220212002000001 |
4 | 13220102000020 |
5 | 230232000013 |
6 | 20411252344 |
7 | 3112660603 |
oct | 750220010 |
9 | 286762001 |
10 | 128000008 |
11 | 66286334 |
12 | 36a4a0b4 |
13 | 20698366 |
14 | 12ddd33a |
15 | b385ddd |
hex | 7a12008 |
128000008 has 32 divisors (see below), whose sum is σ = 243639000. Its totient is φ = 63037440.
The previous prime is 128000003. The next prime is 128000009. The reversal of 128000008 is 800000821.
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 122810724 + 5189284 = 11082^2 + 2278^2 .
It is not an unprimeable number, because it can be changed into a prime (128000003) 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, 199368 + ... + 200008.
Almost surely, 2128000008 is an apocalyptic number.
It is an amenable number.
128000008 is a deficient number, since it is larger than the sum of its proper divisors (115638992).
128000008 is a wasteful number, since it uses less digits than its factorization.
128000008 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 985 (or 981 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 19.
The square root of 128000008 is about 11313.7088525381. The cubic root of 128000008 is about 503.9684304573.
Adding to 128000008 its reverse (800000821), we get a palindrome (928000829).
It can be divided in two parts, 12800000 and 8, that multiplied together give a 5-th power (102400000 = 405).
The spelling of 128000008 in words is "one hundred twenty-eight million, eight", and thus it is an aban number.
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