Base | Representation |
---|---|
bin | 1111010111101… |
… | …01001001000111 |
3 | 22222121100020002 |
4 | 13223311021013 |
5 | 231001233000 |
6 | 20443231515 |
7 | 3123614210 |
oct | 753651107 |
9 | 288540202 |
10 | 128930375 |
11 | 66861332 |
12 | 3721859b |
13 | 20932982 |
14 | 131a2407 |
15 | b4bb8d5 |
hex | 7af5247 |
128930375 has 32 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 85344000.
The previous prime is 128930339. The next prime is 128930377. The reversal of 128930375 is 573039821.
It is not a de Polignac number, because 128930375 - 28 = 128930119 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (128930377) 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, 22835 + ... + 27915.
It is an arithmetic number, because the mean of its divisors is an integer number (5945940).
Almost surely, 2128930375 is an apocalyptic number.
128930375 is a deficient number, since it is larger than the sum of its proper divisors (61339705).
128930375 is an equidigital number, since it uses as much as digits as its factorization.
128930375 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5132 (or 5122 counting only the distinct ones).
The product of its (nonzero) digits is 45360, while the sum is 38.
The square root of 128930375 is about 11354.7512081947. The cubic root of 128930375 is about 505.1865141201.
The spelling of 128930375 in words is "one hundred twenty-eight million, nine hundred thirty thousand, three hundred seventy-five".
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