500380

Appears in sequences

• The EulerPhi(sigma(EulerPhi))-perfect numbers, where the f-perfect numbers for an arithmetical function f are defined in A066218.at n=5A066228
• Numbers having n digits in base n+1, and equal to the determinant of a circulant matrix based on these digits.at n=16A303261
• Numbers equal to the determinant of a circulant matrix based on the base-8 digits of n.at n=23A303368