Base | Representation |
---|---|
bin | 11100001101001100… |
… | …000010000001010001 |
3 | 2220011200111200020101 |
4 | 130031030002001101 |
5 | 444011210411011 |
6 | 21525130412401 |
7 | 2121341666203 |
oct | 341514020121 |
9 | 86150450211 |
10 | 30286028881 |
11 | 11931745839 |
12 | 5a52891101 |
13 | 2b18710964 |
14 | 1674422773 |
15 | bc3cc82c1 |
hex | 70d302051 |
30286028881 has 8 divisors (see below), whose sum is σ = 30315769344. Its totient is φ = 30256307520.
The previous prime is 30286028873. The next prime is 30286028891. The reversal of 30286028881 is 18882068203.
It is a happy number.
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 30286028881 - 23 = 30286028873 is a prime.
It is a super-3 number, since 3×302860288813 (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (30286028891) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7365016 + ... + 7369126.
It is an arithmetic number, because the mean of its divisors is an integer number (3789471168).
Almost surely, 230286028881 is an apocalyptic number.
It is an amenable number.
30286028881 is a deficient number, since it is larger than the sum of its proper divisors (29740463).
30286028881 is a wasteful number, since it uses less digits than its factorization.
30286028881 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9551.
The product of its (nonzero) digits is 294912, while the sum is 46.
The spelling of 30286028881 in words is "thirty billion, two hundred eighty-six million, twenty-eight thousand, eight hundred eighty-one".
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