Base | Representation |
---|---|
bin | 111010011100… |
… | …0011100100110 |
3 | 2010122200001111 |
4 | 1310320130212 |
5 | 30320434120 |
6 | 3012415234 |
7 | 521302120 |
oct | 164703446 |
9 | 63580044 |
10 | 30639910 |
11 | 16328244 |
12 | a31751a |
13 | 646a332 |
14 | 40d8210 |
15 | 2a5375a |
hex | 1d38726 |
30639910 has 32 divisors (see below), whose sum is σ = 65774592. Its totient is φ = 10047840.
The previous prime is 30639877. The next prime is 30639919. The reversal of 30639910 is 1993603.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30639919) 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 15 ways as a sum of consecutive naturals, for example, 7906 + ... + 11125.
It is an arithmetic number, because the mean of its divisors is an integer number (2055456).
Almost surely, 230639910 is an apocalyptic number.
30639910 is an abundant number, since it is smaller than the sum of its proper divisors (35134682).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30639910 is a wasteful number, since it uses less digits than its factorization.
30639910 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19068.
The product of its (nonzero) digits is 4374, while the sum is 31.
The square root of 30639910 is about 5535.3328716528. The cubic root of 30639910 is about 312.9170027670.
The spelling of 30639910 in words is "thirty million, six hundred thirty-nine thousand, nine hundred ten".
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