Base | Representation |
---|---|
bin | 111001111000… |
… | …1001100110001 |
3 | 2010002211202000 |
4 | 1303301030301 |
5 | 30232114311 |
6 | 3002244213 |
7 | 515645241 |
oct | 163611461 |
9 | 63084660 |
10 | 30348081 |
11 | 16148a65 |
12 | a1b6669 |
13 | 639755a |
14 | 405db21 |
15 | 29e7056 |
hex | 1cf1331 |
30348081 has 16 divisors (see below), whose sum is σ = 45088320. Its totient is φ = 20174400.
The previous prime is 30348053. The next prime is 30348083. The reversal of 30348081 is 18084303.
It is not a de Polignac number, because 30348081 - 223 = 21959473 is a prime.
It is a super-2 number, since 2×303480812 = 1842012040765122, which contains 22 as substring.
It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (30348083) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9426 + ... + 12228.
It is an arithmetic number, because the mean of its divisors is an integer number (2818020).
Almost surely, 230348081 is an apocalyptic number.
It is an amenable number.
30348081 is a deficient number, since it is larger than the sum of its proper divisors (14740239).
30348081 is a wasteful number, since it uses less digits than its factorization.
30348081 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3213 (or 3207 counting only the distinct ones).
The product of its (nonzero) digits is 2304, while the sum is 27.
The square root of 30348081 is about 5508.9092386787. The cubic root of 30348081 is about 311.9203753910.
It can be divided in two parts, 303 and 48081, that added together give a palindrome (48384).
The spelling of 30348081 in words is "thirty million, three hundred forty-eight thousand, eighty-one".
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