Base | Representation |
---|---|
bin | 111010010110… |
… | …0100000110100 |
3 | 2010120012000001 |
4 | 1310230200310 |
5 | 30312403103 |
6 | 3011401044 |
7 | 521006446 |
oct | 164544064 |
9 | 63505001 |
10 | 30591028 |
11 | 162a4546 |
12 | a2b3184 |
13 | 6451000 |
14 | 40c4496 |
15 | 2a4401d |
hex | 1d2c834 |
30591028 has 36 divisors (see below), whose sum is σ = 58993060. Its totient is φ = 13879632.
The previous prime is 30591023. The next prime is 30591037. The reversal of 30591028 is 82019503.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 29463184 = 1062^2 + 5428^2 .
It is a junction number, because it is equal to n+sod(n) for n = 30590987 and 30591005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30591023) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518463 + ... + 518521.
Almost surely, 230591028 is an apocalyptic number.
It is an amenable number.
30591028 is a deficient number, since it is larger than the sum of its proper divisors (28402032).
30591028 is an equidigital number, since it uses as much as digits as its factorization.
30591028 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 161 (or 74 counting only the distinct ones).
The product of its (nonzero) digits is 2160, while the sum is 28.
The square root of 30591028 is about 5530.9156565618. The cubic root of 30591028 is about 312.7505080393.
The spelling of 30591028 in words is "thirty million, five hundred ninety-one thousand, twenty-eight".
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