489640 has 16 divisors (see below), whose sum is σ = 1101780. Its totient is φ = 195840.

The previous prime is 489631. The next prime is 489653. The reversal of 489640 is 46984.

It can be written as a sum of positive squares in 2 ways, for example, as 470596 + 19044 = 686^2 + 138^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6081 + ... + 6160.

2⁴⁸⁹⁶⁴⁰ is an apocalyptic number.

489640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489640 is an abundant number, since it is smaller than the sum of its proper divisors (612140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489640 is a wasteful number, since it uses less digits than its factorization.

489640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12252 (or 12248 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 489640 is about 699.7428098952. The cubic root of 489640 is about 78.8180397943.

The spelling of 489640 in words is "four hundred eighty-nine thousand, six hundred forty".