836 (number)
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|---|---|---|---|---|
| Cardinal | eight hundred thirty-six | |||
| Ordinal | 836th (eight hundred thirty-sixth) | |||
| Factorization | 22 × 11 × 19 | |||
| Greek numeral | ΩΛϚ´ | |||
| Roman numeral | DCCCXXXVI, dcccxxxvi | |||
| Binary | 11010001002 | |||
| Ternary | 10102223 | |||
| Senary | 35126 | |||
| Octal | 15048 | |||
| Duodecimal | 59812 | |||
| Hexadecimal | 34416 | |||
836 (eight hundred [and] thirty-six) is the natural number following 835 and preceding 837.
In mathematics
[edit]The factorization of 836 is 22 × 11 × 19, so its proper factors are 1, 2, 4, 11, 19, 22, 38, 44, 76, 209, and 418.[1] They sum to 844. As this is greater than 836, it is an abundant number,[2] but no subset sums to 836, so it is not a semiperfect number; therefore it is a weird number.[3] more specifically the second one.[4][5] Besides, 836 is the smallest weird number that is also an untouchable number,[6] i.e. there is no n such that the sum of proper factors of n equals 836 (The only smaller weird number, 70, is not untouchable, since σ(134) − 134 = 70). 836 is a non-palindrome with a palindromic square.[7]
See also
[edit]- 836, a year
- 836 Jole, an asteroid
- 836th Air Division, an inactive United States Air Force organization
- 836 Naval Air Squadron, a World War II organization in the British Navy
- Pi Arietis, designated as object 836 in the Bright Star catalogue
References
[edit]- ↑ Vanovschi, Vitalii. "Properties of the number 836". www.numberempire.com. Retrieved 2026-08-24.
- ↑ "The Positive Integer 836". www.positiveintegers.org. Retrieved 2026-08-24.
- ↑ "Sloane's A006037 : Weird numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-02.
- ↑ Hussein, Hussein A.; Al-Maamori, Faez A. (2024-08-26). "On using of weird number sequence in counting Beurling prime systems". Journal of Discrete Mathematical Sciences & Cryptography. 27 (5): 1695–1704. doi:10.47974/JDMSC-2011.
- ↑ Abdulkarim, Saja A.; Al-Maamori, Faez A (2026-06-26). "A bit of modification on the forms of the weird numbers with an application on cryptosystem" (PDF). Journal of Interdisciplinary Mathematics. 29: 1369. doi:10.47974/JIM-2594. Retrieved 2026-08-25.
- ↑ Sloane, N. J. A. (ed.). "Sequence A005114 (Untouchable numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "What's Special About This Number?". erich-friedman.github.io. Retrieved 2026-08-24.
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