40662

Appears in sequences

• sigma(n) + phi(n) is a fourth power.at n=11A114068
• Numbers k such that sigma(k - 2) = sigma(k + 2).at n=31A223091
• Least integer k>1 such that sqrt(k)/log(k) exceeds n.at n=18A262058
• Triples of practical numbers: numbers n such that n-2, n, n+2 are all practical numbers.at n=40A287682
• Starts of runs of 3 consecutive tribonacci-Niven numbers (A352089).at n=21A352091