489866 has 16 divisors (see below), whose sum is σ = 804384. Its totient is φ = 222384.

The previous prime is 489851. The next prime is 489869. The reversal of 489866 is 668984.

489866 = T₂₆₈ + T₂₆₉ + ... + T₂₈₀.

It is not an unprimeable number, because it can be changed into a prime (489869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (50274).

2⁴⁸⁹⁸⁶⁶ is an apocalyptic number.

489866 is a deficient number, since it is larger than the sum of its proper divisors (314518).

489866 is a wasteful number, since it uses less digits than its factorization.

489866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325.

The product of its digits is 82944, while the sum is 41.

The square root of 489866 is about 699.9042791697. The cubic root of 489866 is about 78.8301644418.

The spelling of 489866 in words is "four hundred eighty-nine thousand, eight hundred sixty-six".