6400

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6400 < 6399 | 6401 >
All Numbers
6400	6401	6402	6403	6404	6405	6406	6407	6408	6409
6410	6411	6412	6413	6414	6415	6416	6417	6418	6419
6420	6421	6422	6423	6424	6425	6426	6427	6428	6429
6430	6431	6432	6433	6434	6435	6436	6437	6438	6439
6440	6441	6442	6443	6444	6445	6446	6447	6448	6449
6450	6451	6452	6453	6454	6455	6456	6457	6458	6459
6460	6461	6462	6463	6464	6465	6466	6467	6468	6469
6470	6471	6472	6473	6474	6475	6476	6477	6478	6479
6480	6481	6482	6483	6484	6485	6486	6487	6488	6489
6490	6491	6492	6493	6494	6495	6496	6497	6498	6499

6400 is the number following 6399 and preceding 6401.

Properties

• Its factors are 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200 and 6400, making it a composite number.
• 6400 is an even number .
• 6400 is an unhappy number.
  

• 6400 is a centered octagonal number.
  
• 6400 is abundant.
  
• Its prime factorization is 2⁸ × 5².
  
• 6400 is a Harshad number, meaning it is divisible by the sum of its digits.
  

Approximations

Notation	Lower bound	Upper bound
Up-arrow notation	80 ↑ 2
Scientific notation	6.4 x 103	6.401 x 103
Slow-growing hierarchy	\(g_{\omega^{\omega}}(5)\)	\(g_{\omega^{\omega}}(6)\)
Copy notation	63[2]	64[2]
Chained arrow notation	80 → 2
Bowers' Exploding Array Function/Bird's array notation	{80,2}
Fast-growing hierarchy	f2(9)	f2(10)
Hardy hierarchy	Hω(3200)	Hω(3200)
Middle-growing hierarchy	m(ω,12)	m(ω,13)
Hyper-E notation	E3.8062
Hyper-E notation (non-10 base)	\(E[80]2\)
Hyperfactorial array notation	7!	8!
X-Sequence Hyper-Exponential Notation	80{1}2
Steinhaus-Moser Notation	5[3]	6[3]
PlantStar's Debut Notation	[2]	[3]
H* function	H(0.2)	H(0.3)
Bashicu matrix system with respect to version 4	(0)[80]	(0)[80]
m(n) map	m(1)(5)	m(1)(6)
s(n) map	\(s(1)(\lambda x . x+1)(3199)\)	\(s(1)(\lambda x . x+1)(3200)\)