865435968 has 56 divisors (see below), whose sum is σ = 2544226560. Its totient is φ = 288478080.

The previous prime is 865435939. The next prime is 865436023. The reversal of 865435968 is 869534568.

It is a happy number.

865435968 is a `hidden beast` number, since 8 + 6 + 5 + 43 + 596 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248688 + ... + 252143.

Almost surely, 2^865435968 is an apocalyptic number.

It is an amenable number.

865435968 is an abundant number, since it is smaller than the sum of its proper divisors (1678790592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865435968 is a wasteful number, since it uses less digits than its factorization.

865435968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500852 (or 500836 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 865435968 is about 29418.2930844058. The cubic root of 865435968 is about 952.9679912409.

The spelling of 865435968 in words is "eight hundred sixty-five million, four hundred thirty-five thousand, nine hundred sixty-eight".