865340 has 36 divisors (see below), whose sum is σ = 2116296. Its totient is φ = 296352.

The previous prime is 865339. The next prime is 865343. The reversal of 865340 is 43568.

865340 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 not an unprimeable number, because it can be changed into a prime (865343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (58786).

2⁸⁶⁵³⁴⁰ 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 865340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058148).

865340 is an abundant number, since it is smaller than the sum of its proper divisors (1250956).

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

865340 is a wasteful number, since it uses less digits than its factorization.

865340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 865340 is about 930.2365290613. The cubic root of 865340 is about 95.2932765137.

The spelling of 865340 in words is "eight hundred sixty-five thousand, three hundred forty".