88

Number
$88$ (eighty-eight) is:


 * $2^3 \times 11$


 * The index of the $1$st non-integer term of the $3$-Göbel sequence.


 * The $3$rd primitive abundant number after $20$, $70$:
 * $1 + 2 + 4 + 8 + 11 + 22 + 44 = 92 > 88$


 * The $4$th untouchable number after $2$, $5$, $52$.


 * The $4$th primitive semiperfect number after $6$, $20$, $28$:
 * $88 = 1 + 2 + 8 + 11 + 22 + 44$


 * The $20$th semiperfect number after $6$, $12$, $18$, $20$, $24$, $28$, $30$, $36$, $40$, $42$, $48$, $54$, $56$, $60$, $66$, $72$, $78$, $80$, $84$


 * The $34$th of $35$ integers less than $91$ to which $91$ itself is a Fermat pseudoprime:
 * $3$, $4$, $9$, $10$, $12$, $16$, $17$, $22$, $23$, $25$, $27$, $29$, $30$, $36$, $38$, $40$, $43$, $48$, $51$, $53$, $55$, $61$, $62$, $64$, $66$, $68$, $69$, $74$, $75$, $79$, $81$, $82$, $87$, $88$, $\ldots$


 * A repdigit whose square is two repdigits together:
 * $88^2 = 7744$

Also see

 * Non-Integral Value of 3-Göbel Sequence