865384 has 32 divisors (see below), whose sum is σ = 1791720. Its totient is φ = 389376.

The previous prime is 865379. The next prime is 865409. The reversal of 865384 is 483568.

It can be written as a sum of positive squares in 4 ways, for example, as 605284 + 260100 = 778^2 + 510^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5434 + ... + 5590.

2⁸⁶⁵³⁸⁴ 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 865384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895860).

865384 is an abundant number, since it is smaller than the sum of its proper divisors (926336).

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

865384 is a wasteful number, since it uses less digits than its factorization.

865384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 225 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 865384 is about 930.2601786597. The cubic root of 865384 is about 95.2948916141.

The spelling of 865384 in words is "eight hundred sixty-five thousand, three hundred eighty-four".