Base | Representation |
---|---|
bin | 111001010001… |
… | …1110000100111 |
3 | 2002111201122002 |
4 | 1302203300213 |
5 | 30141442022 |
6 | 2551355515 |
7 | 513154415 |
oct | 162436047 |
9 | 62451562 |
10 | 30030887 |
11 | 15a51717 |
12 | a082b9b |
13 | 62b6073 |
14 | 3dba2b5 |
15 | 2983092 |
hex | 1ca3c27 |
30030887 has 4 divisors (see below), whose sum is σ = 31611480. Its totient is φ = 28450296.
The previous prime is 30030883. The next prime is 30030907. The reversal of 30030887 is 78803003.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78803003 = 89 ⋅885427.
It is not a de Polignac number, because 30030887 - 22 = 30030883 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30030881) 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 3 ways as a sum of consecutive naturals, for example, 790268 + ... + 790305.
It is an arithmetic number, because the mean of its divisors is an integer number (7902870).
Almost surely, 230030887 is an apocalyptic number.
30030887 is a deficient number, since it is larger than the sum of its proper divisors (1580593).
30030887 is a wasteful number, since it uses less digits than its factorization.
30030887 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1580592.
The product of its (nonzero) digits is 4032, while the sum is 29.
The square root of 30030887 is about 5480.0444341264. The cubic root of 30030887 is about 310.8298507869.
The spelling of 30030887 in words is "thirty million, thirty thousand, eight hundred eighty-seven".
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