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86 (number)

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← 85 86 87 →
Cardinaleighty-six
Ordinal86th
(eighty-sixth)
Factorization2 × 43
Divisors1, 2, 43, 86
Greek numeralΠϚ´
Roman numeralLXXXVI
Binary10101102
Ternary100123
Senary2226
Octal1268
Duodecimal7212
Hexadecimal5616

86 (eighty-six) is the natural number following 85 and preceding 87.

In mathematics

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86 is:

It appears in the Padovan sequence, preceded by the terms 37, 49, 65 (it is the sum of the first two of these).[8]

It is conjectured that 86 is the largest n for which the decimal expansion of 2n contains no 0.[9]

86 = (8 × 6 = 48) + (4 × 8 = 32) + (3 × 2 = 6). That is, 86 is equal to the sum of the numbers formed in calculating its multiplicative persistence.

In science

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In other fields

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See also

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Notes

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  1. ^ Sloane, N. J. A. (ed.). "Sequence A005277 (Nontotients)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A005278 (Noncototients)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A006881 (Squarefree semiprimes: Numbers that are the product of two distinct primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ Sloane, N. J. A. (ed.). "Sequence A056809 (Numbers k such that k, k+1 and k+2 are products of two primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A059756 (Erdős-Woods numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^ Sloane, N. J. A. (ed.). "Sequence A007770 (Happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  7. ^ Sloane, N. J. A. (ed.). "Sequence A003052 (Self numbers or Colombian numbers (numbers that are not of the form m + sum of digits of m for any m))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  8. ^ Sloane, N. J. A. (ed.). "Sequence A000931 (Padovan sequence)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  9. ^ Sloane, N. J. A. (ed.). "Sequence A007377 (Numbers k such that the decimal expansion of 2^k contains no 0)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  10. ^ "Where Did the Term 86 Come From?". www.mentalfloss.com. 2013-08-13. Retrieved 2021-10-30.