865396 has 24 divisors (see below), whose sum is σ = 1788416. Its totient is φ = 358560.

The previous prime is 865379. The next prime is 865409. The reversal of 865396 is 693568.

865396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

865396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370 + ... + 1366.

2⁸⁶⁵³⁹⁶ 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 865396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894208).

865396 is an abundant number, since it is smaller than the sum of its proper divisors (923020).

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

865396 is a wasteful number, since it uses less digits than its factorization.

865396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1037 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 865396 is about 930.2666284458. The cubic root of 865396 is about 95.2953320866.

The spelling of 865396 in words is "eight hundred sixty-five thousand, three hundred ninety-six".