865386324 has 72 divisors (see below), whose sum is σ = 2392240032. Its totient is φ = 261593280.

The previous prime is 865386323. The next prime is 865386329. The reversal of 865386324 is 423683568.

It is a happy number.

865386324 is a `hidden beast` number, since 8 + 6 + 5 + 3 + 8 + 632 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 865386324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865386323) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 172962 + ... + 177894.

It is an arithmetic number, because the mean of its divisors is an integer number (33225556).

Almost surely, 2^865386324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865386324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196120016).

865386324 is an abundant number, since it is smaller than the sum of its proper divisors (1526853708).

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

865386324 is a wasteful number, since it uses less digits than its factorization.

865386324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5397 (or 5392 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 865386324 is about 29417.4493115906. The cubic root of 865386324 is about 952.9497691928.

The spelling of 865386324 in words is "eight hundred sixty-five million, three hundred eighty-six thousand, three hundred twenty-four".