# 196 (number)

 ← 195 196 197 →
Cardinal one hundred ninety-six
Ordinal 196th
(one hundred and ninety-sixth)
Factorization 22× 72
Divisors 1, 2, 4, 7, 14, 28, 49, 98, 196
Roman numeral CXCVI
Binary 110001002
Ternary 210213
Quaternary 30104
Quinary 12415
Senary 5246
Octal 3048
Duodecimal 14412
Vigesimal 9G20
Base 36 5G36

196 (one hundred [and] ninety-six) is the natural number following 195 and preceding 197.

## In mathematics

196 is:

There are 196 one-sided heptominoes, the polyominoes made from 7 squares.

### Possible Lychrel number

A Lychrel number is a natural number which cannot form a palindromic number through the iterative process of repeatedly reversing its digits and adding the resulting numbers. 196 is the lowest number conjectured to be a Lychrel number in base 10; the process has been carried out for over billion iterations without finding a palindrome, but no one has ever proven that it will never produce one.

## In other fields

196 is also:

 Wikimedia Commons has media related to 196 (number).

## References

1. "Sloane's A059756 : Erdős-Woods numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
2. "Sloane's A005153 : Practical numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
3. "Sloane's A051682 : 11-gonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
4. "Sloane's A002411 : Pentagonal pyramidal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
5. "Sloane's A002413 : Heptagonal pyramidal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.