865488965 has 48 divisors (see below), whose sum is σ = 1198302336. Its totient is φ = 595056000.

The previous prime is 865488961. The next prime is 865488977. The reversal of 865488965 is 569884568.

It is not a de Polignac number, because 865488965 - 2² = 865488961 is a prime.

It is a super-2 number, since 2×865488965² = 1498142297073542450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865488961) 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 47 ways as a sum of consecutive naturals, for example, 4393247 + ... + 4393443.

It is an arithmetic number, because the mean of its divisors is an integer number (24964632).

Almost surely, 2^865488965 is an apocalyptic number.

It is an amenable number.

865488965 is a deficient number, since it is larger than the sum of its proper divisors (332813371).

865488965 is a wasteful number, since it uses less digits than its factorization.

865488965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 387 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 59.

The square root of 865488965 is about 29419.1938196817. The cubic root of 865488965 is about 952.9874432534.

The spelling of 865488965 in words is "eight hundred sixty-five million, four hundred eighty-eight thousand, nine hundred sixty-five".