489128641 has 12 divisors (see below), whose sum is σ = 532301868. Its totient is φ = 447892992.

The previous prime is 489128639. The next prime is 489128663. The reversal of 489128641 is 146821984.

It can be written as a sum of positive squares in 6 ways, for example, as 24295041 + 464833600 = 4929^2 + 21560^2 .

It is not a de Polignac number, because 489128641 - 2¹ = 489128639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489128141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12765 + ... + 33781.

It is an arithmetic number, because the mean of its divisors is an integer number (44358489).

Almost surely, 2^489128641 is an apocalyptic number.

It is an amenable number.

489128641 is a deficient number, since it is larger than the sum of its proper divisors (43173227).

489128641 is a wasteful number, since it uses less digits than its factorization.

489128641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108 (or 21071 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 489128641 is about 22116.2528697788. The cubic root of 489128641 is about 787.9059217781.

The spelling of 489128641 in words is "four hundred eighty-nine million, one hundred twenty-eight thousand, six hundred forty-one".