Base | Representation |
---|---|
bin | 111001111101… |
… | …0011010001001 |
3 | 2010011202111001 |
4 | 1303322122021 |
5 | 30234321201 |
6 | 3003135001 |
7 | 516163225 |
oct | 163723211 |
9 | 63152431 |
10 | 30385801 |
11 | 16174336 |
12 | a214461 |
13 | 63ab784 |
14 | 406d785 |
15 | 2a03301 |
hex | 1cfa689 |
30385801 has 4 divisors (see below), whose sum is σ = 30959172. Its totient is φ = 29812432.
The previous prime is 30385793. The next prime is 30385811. The reversal of 30385801 is 10858303.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 17598025 + 12787776 = 4195^2 + 3576^2 .
It is a cyclic number.
It is not a de Polignac number, because 30385801 - 23 = 30385793 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 30385801.
It is not an unprimeable number, because it can be changed into a prime (30385811) 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, 286606 + ... + 286711.
It is an arithmetic number, because the mean of its divisors is an integer number (7739793).
Almost surely, 230385801 is an apocalyptic number.
It is an amenable number.
30385801 is a deficient number, since it is larger than the sum of its proper divisors (573371).
30385801 is an equidigital number, since it uses as much as digits as its factorization.
30385801 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 573370.
The product of its (nonzero) digits is 2880, while the sum is 28.
The square root of 30385801 is about 5512.3317207875. The cubic root of 30385801 is about 312.0495517671.
The spelling of 30385801 in words is "thirty million, three hundred eighty-five thousand, eight hundred one".
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