1280

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1280 < 1279 | 1281 >
All Numbers
1200	1201	1202	1203	1204	1205	1206	1207	1208	1209
1210	1211	1212	1213	1214	1215	1216	1217	1218	1219
1220	1221	1222	1223	1224	1225	1226	1227	1228	1229
1230	1231	1232	1233	1234	1235	1236	1237	1238	1239
1240	1241	1242	1243	1244	1245	1246	1247	1248	1249
1250	1251	1252	1253	1254	1255	1256	1257	1258	1259
1260	1261	1262	1263	1264	1265	1266	1267	1268	1269
1270	1271	1272	1273	1274	1275	1276	1277	1278	1279
1280	1281	1282	1283	1284	1285	1286	1287	1288	1289
1290	1291	1292	1293	1294	1295	1296	1297	1298	1299

1280 is the number following 1279 and preceding 1281.

Properties

• Its factors are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640 and 1280, making it a composite number.
• 1280 is an even number .
• 1280 is an unhappy number.
  

• 1280 is abundant.
  
• Its prime factorization is 2⁸ × 5¹.
  

Approximations

Notation	Lower bound	Upper bound
Up-arrow notation	36 ↑ 2
Scientific notation	1.28 x 103	1.281 x 103
Slow-growing hierarchy	\(g_{\omega^{\omega}}(4)\)	\(g_{\omega^{\omega}}(5)\)
Copy notation	12[2]	13[2]
Chained arrow notation	36 → 2
Bowers' Exploding Array Function/Bird's array notation	{36,2}
Fast-growing hierarchy	f2(7)	f2(8)
Hardy hierarchy	Hω(640)	Hω(640)
Middle-growing hierarchy	m(ω,10)	m(ω,11)
Hyper-E notation	E3.1072
Hyper-E notation (non-10 base)	\(E[36]2\)
Hyperfactorial array notation	6!	7!
X-Sequence Hyper-Exponential Notation	36{1}2
Steinhaus-Moser Notation	4[3]	5[3]
PlantStar's Debut Notation	[1]	[2]
H* function	H(0)	H(0.1)
Bashicu matrix system with respect to version 4	(0)[35]	(0)[36]
m(n) map	m(1)(4)	m(1)(5)
s(n) map	\(s(1)(\lambda x . x+1)(639)\)	\(s(1)(\lambda x . x+1)(640)\)