489665040 has 80 divisors (see below), whose sum is σ = 1527396288. Its totient is φ = 129765888.

The previous prime is 489665027. The next prime is 489665081. The reversal of 489665040 is 40566984.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 489664983 and 489665001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32862 + ... + 45378.

Almost surely, 2^489665040 is an apocalyptic number.

489665040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489665040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763698144).

489665040 is an abundant number, since it is smaller than the sum of its proper divisors (1037731248).

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

489665040 is a wasteful number, since it uses less digits than its factorization.

489665040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12696 (or 12690 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 489665040 is about 22128.3763525479. The cubic root of 489665040 is about 788.1938334610.

The spelling of 489665040 in words is "four hundred eighty-nine million, six hundred sixty-five thousand, forty".