1440

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1440 < 1439 | 1441 >
All Numbers
1400	1401	1402	1403	1404	1405	1406	1407	1408	1409
1410	1411	1412	1413	1414	1415	1416	1417	1418	1419
1420	1421	1422	1423	1424	1425	1426	1427	1428	1429
1430	1431	1432	1433	1434	1435	1436	1437	1438	1439
1440	1441	1442	1443	1444	1445	1446	1447	1448	1449
1450	1451	1452	1453	1454	1455	1456	1457	1458	1459
1460	1461	1462	1463	1464	1465	1466	1467	1468	1469
1470	1471	1472	1473	1474	1475	1476	1477	1478	1479
1480	1481	1482	1483	1484	1485	1486	1487	1488	1489
1490	1491	1492	1493	1494	1495	1496	1497	1498	1499

1440 is the number following 1439 and preceding 1441.

Properties

• Its factors are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720 and 1440, making it a composite number.
• 1440 is an even number .
• 1440 is an unhappy number.
  

• 1440 is abundant.
  
• Its prime factorization is 2⁵ × 3² × 5¹.
  
• 1440 is the order of the automorphism group of the simple group A₆.
• It is the number of minutes in a day.

Approximations

Notation	Lower bound	Upper bound
Up-arrow notation	38 ↑ 2
Scientific notation	1.44 x 103	1.441 x 103
Slow-growing hierarchy	\(g_{\omega^{\omega}}(4)\)	\(g_{\omega^{\omega}}(5)\)
Copy notation	14[2]	15[2]
Chained arrow notation	38 → 2
Bowers' Exploding Array Function/Bird's array notation	{38,2}
Fast-growing hierarchy	f2(7)	f2(8)
Hardy hierarchy	Hω(720)	Hω(720)
Middle-growing hierarchy	m(ω,10)	m(ω,11)
Hyper-E notation	E3.1584
Hyper-E notation (non-10 base)	\(E[38]2\)
Hyperfactorial array notation	6!	7!
X-Sequence Hyper-Exponential Notation	38{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)[37]	(0)[38]
m(n) map	m(1)(4)	m(1)(5)
s(n) map	\(s(1)(\lambda x . x+1)(719)\)	\(s(1)(\lambda x . x+1)(720)\)