489913668 has 36 divisors (see below), whose sum is σ = 1240162560. Its totient is φ = 163071216.

The previous prime is 489913643. The next prime is 489913691. The reversal of 489913668 is 866319984.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16813 + ... + 35531.

It is an arithmetic number, because the mean of its divisors is an integer number (34448960).

Almost surely, 2^489913668 is an apocalyptic number.

It is an amenable number.

489913668 is an abundant number, since it is smaller than the sum of its proper divisors (750248892).

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

489913668 is a wasteful number, since it uses less digits than its factorization.

489913668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19456 (or 19451 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 489913668 is about 22133.9934941709. The cubic root of 489913668 is about 788.3272130044.

The spelling of 489913668 in words is "four hundred eighty-nine million, nine hundred thirteen thousand, six hundred sixty-eight".