489657868 has 48 divisors (see below), whose sum is σ = 1043449344. Its totient is φ = 196266240.

The previous prime is 489657863. The next prime is 489657877. The reversal of 489657868 is 868756984.

It is not an unprimeable number, because it can be changed into a prime (489657863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74433 + ... + 80743.

It is an arithmetic number, because the mean of its divisors is an integer number (21738528).

Almost surely, 2^489657868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489657868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521724672).

489657868 is an abundant number, since it is smaller than the sum of its proper divisors (553791476).

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

489657868 is a wasteful number, since it uses less digits than its factorization.

489657868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502 (or 6500 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 61.

The square root of 489657868 is about 22128.2142975885. The cubic root of 489657868 is about 788.1899852837.

The spelling of 489657868 in words is "four hundred eighty-nine million, six hundred fifty-seven thousand, eight hundred sixty-eight".