489510865 has 16 divisors (see below), whose sum is σ = 610318800. Its totient is φ = 376456192.

The previous prime is 489510841. The next prime is 489510883. The reversal of 489510865 is 568015984.

It can be written as a sum of positive squares in 8 ways, for example, as 79691329 + 409819536 = 8927^2 + 20244^2 .

It is not a de Polignac number, because 489510865 - 2¹⁹ = 488986577 is a prime.

It is a super-3 number, since 3×489510865³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26541 + ... + 41029.

It is an arithmetic number, because the mean of its divisors is an integer number (38144925).

Almost surely, 2^489510865 is an apocalyptic number.

It is an amenable number.

489510865 is a deficient number, since it is larger than the sum of its proper divisors (120807935).

489510865 is a wasteful number, since it uses less digits than its factorization.

489510865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14756.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 489510865 is about 22124.8924291170. The cubic root of 489510865 is about 788.1111017088. Note that the first 4 decimals are identical.

The spelling of 489510865 in words is "four hundred eighty-nine million, five hundred ten thousand, eight hundred sixty-five".