Base | Representation |
---|---|
bin | 111010101111… |
… | …1100101110101 |
3 | 2010221210222211 |
4 | 1311133211311 |
5 | 30341101440 |
6 | 3020053421 |
7 | 522540430 |
oct | 165374565 |
9 | 63853884 |
10 | 30800245 |
11 | 16427753 |
12 | a394271 |
13 | 64c52c8 |
14 | 413a817 |
15 | 2a85eea |
hex | 1d5f975 |
30800245 has 8 divisors (see below), whose sum is σ = 42240384. Its totient is φ = 21120144.
The previous prime is 30800219. The next prime is 30800251. The reversal of 30800245 is 54200803.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 30800245 - 25 = 30800213 is a prime.
It is a Duffinian number.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439969 + ... + 440038.
It is an arithmetic number, because the mean of its divisors is an integer number (5280048).
Almost surely, 230800245 is an apocalyptic number.
30800245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.
It is an amenable number.
30800245 is a deficient number, since it is larger than the sum of its proper divisors (11440139).
30800245 is an equidigital number, since it uses as much as digits as its factorization.
30800245 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 880019.
The product of its (nonzero) digits is 960, while the sum is 22.
The square root of 30800245 is about 5549.7968431286. The cubic root of 30800245 is about 313.4618725926.
The spelling of 30800245 in words is "thirty million, eight hundred thousand, two hundred forty-five".
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