75880

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 4, 5, 7 and 8.at n=11A136951
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<=2z.at n=19A212507
• Numbers n such that the result of n multiplied by the reversal of n can be split into two numbers a and b of equal length (if the length is odd a leading zero is allowed), where a + b equals n (b can also have a leading zero).at n=15A259316
• Nonunitary weird numbers: numbers that are nonunitary abundant but not nonunitary pseudoperfect.at n=32A327948