489648385 has 4 divisors (see below), whose sum is σ = 587578068. Its totient is φ = 391718704.

The previous prime is 489648377. The next prime is 489648389. The reversal of 489648385 is 583846984.

It is a Cunningham number, because it is equal to 22128²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176252176 + 313396209 = 13276^2 + 17703^2 .

It is a cyclic number.

It is not a de Polignac number, because 489648385 - 2³ = 489648377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489648389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48964834 + ... + 48964843.

It is an arithmetic number, because the mean of its divisors is an integer number (146894517).

Almost surely, 2^489648385 is an apocalyptic number.

It is an amenable number.

489648385 is a deficient number, since it is larger than the sum of its proper divisors (97929683).

489648385 is an equidigital number, since it uses as much as digits as its factorization.

489648385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97929682.

The product of its digits is 6635520, while the sum is 55.

The square root of 489648385 is about 22128.0000225958. Note that the first 4 decimals coincide. The cubic root of 489648385 is about 788.1848970684.

The spelling of 489648385 in words is "four hundred eighty-nine million, six hundred forty-eight thousand, three hundred eighty-five".