489438865 has 16 divisors (see below), whose sum is σ = 596693952. Its totient is φ = 385354944.

The previous prime is 489438811. The next prime is 489438869. The reversal of 489438865 is 568834984.

It is a cyclic number.

It is not a de Polignac number, because 489438865 - 2²¹ = 487341713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489438869) 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, 81082 + ... + 86908.

It is an arithmetic number, because the mean of its divisors is an integer number (37293372).

Almost surely, 2^489438865 is an apocalyptic number.

It is an amenable number.

489438865 is a deficient number, since it is larger than the sum of its proper divisors (107255087).

489438865 is a wasteful number, since it uses less digits than its factorization.

489438865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096.

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

The square root of 489438865 is about 22123.2652427258. The cubic root of 489438865 is about 788.0724598824.

The spelling of 489438865 in words is "four hundred eighty-nine million, four hundred thirty-eight thousand, eight hundred sixty-five".