388

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Number

$388$ (three hundred and eighty-eight) is:

$2^2 \times 97$

The $6$th positive integer after $1$, $24$, $26$, $87$, $168$ whose Euler $\phi$ value is equal to the product of its digits:

$\map \phi {388} = 192 = 3 \times 8 \times 8$

The $2$nd of the $11$th pair of consecutive integers which both have $6$ divisors:

$\map {\sigma_0} {387} = \map {\sigma_0} {388} = 6$

Arithmetic Functions on $388$

\(\ds \map {\sigma_0} { 388 }\)

\(=\)

\(\ds 6\)

$\sigma_0$ of $388$

\(\ds \map \phi { 388 }\)

\(=\)

\(\ds 192\)

$\phi$ of $388$

Also see

• Previous  ... Next: Numbers for which Euler Phi Function equals Product of Digits
• Previous  ... Next: Pairs of Consecutive Integers with 6 Divisors