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128

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128 is the seventh power of 2.

Membership in core sequences

Even numbers ..., 122, 124, 126, 128, 130, 132, 134, ... A005843
Composite numbers ..., 124, 125, 126, 128, 129, 130, 132, ... A002808
Powers of 2 ..., 16, 32, 64, 128, 256, 512, 1024, ... A000079
Numbers that are the sum of two squares ..., 121, 122, 125, 128, 130, 136, 137, ... A001481

Sequences pertaining to 128

Multiples of 128 0, 128, 256, 384, 512, 640, 768, 896, 1024, 1152, 1280, 1408, 1536, ...
sequence beginning at 75 75, 226, 113, 340, 170, 85, 256, 128, 64, 32, 16, 8, 4, 2, 1, 4, 2, 1, ... A258056
sequence beginning at 87 ..., 920, 460, 230, 115, 344, 172, 86, 43, 128, 64, 32, 16, 8, 4, 2, 1, ... A008899

Partitions of 128

There are 4351078600 partitions of 128.

The Goldbach representations of 128 are: 109 + 19 = 97 + 31 = 67 + 61 = 128.

Roots and powers of 128

In the table below, irrational numbers are given truncated to eight decimal places.

TABLE GOES HERE

Logarithms and 128th powers

In the OEIS specifically and mathematics in general, refers to the natural logarithm of , whereas all other bases are specified with a subscript.

As above, irrational numbers in the following table are truncated to eight decimal places.

TABLE GOES HERE

Values for number theoretic functions with 128 as an argument

TABLE GOES HERE

Factorization of 8 in some quadratic integer rings

In , 128 has the prime factorization of 2 7. But it has different factorizations in some quadratic integer rings.

TABLE GOES HERE

Representation of 128 in various bases

TABLE GOES HERE

See also

Some integers
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
1729