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Forty-fours is equal to $$4 \lfloor 10^{40} / 9\rfloor$$, or 40 copies of 4:[1]

4,444,444,444,444,444,444,444,444,444,444,444,444,444 or hypermathematically with interior superscription as $$4^{38}4$$
googology

Its prime factorization is 22 × 11 × 41 × 73 × 101 × 137 × 271 × 3,541 × 9,091 × 27,961 × 1,676,321 × 5,964,848,081.

## Approximations Edit

Notation Lower bound Upper bound
Scientific notation $$4.444\times10^{39}$$ $$4.445\times10^{39}$$
Arrow notation $$96\uparrow20$$ $$53\uparrow23$$
Steinhaus-Moser Notation 27[3] 28[3]
Copy notation 4[40]
Taro's multivariable Ackermann function A(3,128) A(3,129)
Pound-Star Notation #*(9,8,0,2)*7 #*(0,5,1,9,10)*5
BEAF {96,20} {53,23}
Hyper-E notation 4E39 5E39
Bashicu matrix system (0)(0)(0)[90360] (0)(0)(0)[90361]
Hyperfactorial array notation 34! 35!
Fast-growing hierarchy $$f_2(124)$$ $$f_2(125)$$
Hardy hierarchy $$H_{\omega^2}(124)$$ $$H_{\omega^2}(125)$$
Slow-growing hierarchy $$g_{\omega^{\omega2}13}(16)$$ $$g_{\omega^{\omega6+4}6}(7)$$

## Sources Edit

1. Halm, Michael Joseph. neologisms. Archived from the original on 2014-02-19. Retrieved 2018-02-26.