489728656 has 20 divisors (see below), whose sum is σ = 1004664492. Its totient is φ = 230460416.

The previous prime is 489728647. The next prime is 489728683. The reversal of 489728656 is 656827984.

It can be written as a sum of positive squares in 2 ways, for example, as 352838656 + 136890000 = 18784^2 + 11700^2 .

It is a junction number, because it is equal to n+sod(n) for n = 489728597 and 489728606.

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, 899965 + ... + 900508.

Almost surely, 2^489728656 is an apocalyptic number.

It is an amenable number.

489728656 is an abundant number, since it is smaller than the sum of its proper divisors (514935836).

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

489728656 is a wasteful number, since it uses less digits than its factorization.

489728656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800498 (or 1800492 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The square root of 489728656 is about 22129.8137362247. The cubic root of 489728656 is about 788.2279653427.

The spelling of 489728656 in words is "four hundred eighty-nine million, seven hundred twenty-eight thousand, six hundred fifty-six".