Base | Representation |
---|---|
bin | 111010110111… |
… | …0001100100111 |
3 | 2011001212001121 |
4 | 1311232030213 |
5 | 30400010241 |
6 | 3021234411 |
7 | 523210024 |
oct | 165561447 |
9 | 64055047 |
10 | 30860071 |
11 | 164686a0 |
12 | a402a07 |
13 | 65165c8 |
14 | 415454b |
15 | 2a98ad1 |
hex | 1d6e327 |
30860071 has 4 divisors (see below), whose sum is σ = 33665544. Its totient is φ = 28054600.
The previous prime is 30860069. The next prime is 30860113. The reversal of 30860071 is 17006803.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17006803 = 11 ⋅1546073.
It is a cyclic number.
It is not a de Polignac number, because 30860071 - 21 = 30860069 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30860041) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402720 + ... + 1402741.
It is an arithmetic number, because the mean of its divisors is an integer number (8416386).
Almost surely, 230860071 is an apocalyptic number.
30860071 is a deficient number, since it is larger than the sum of its proper divisors (2805473).
30860071 is a wasteful number, since it uses less digits than its factorization.
30860071 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2805472.
The product of its (nonzero) digits is 1008, while the sum is 25.
The square root of 30860071 is about 5555.1841553633. The cubic root of 30860071 is about 313.6646960994.
Adding to 30860071 its reverse (17006803), we get a palindrome (47866874).
The spelling of 30860071 in words is "thirty million, eight hundred sixty thousand, seventy-one".
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