865388 has 6 divisors (see below), whose sum is σ = 1514436. Its totient is φ = 432692.

The previous prime is 865379. The next prime is 865409. The reversal of 865388 is 883568.

It is a happy number.

865388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

865388 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 as a sum of consecutive naturals, namely, 108170 + ... + 108177.

It is an arithmetic number, because the mean of its divisors is an integer number (252406).

2⁸⁶⁵³⁸⁸ is an apocalyptic number.

It is an amenable number.

865388 is a deficient number, since it is larger than the sum of its proper divisors (649048).

865388 is a wasteful number, since it uses less digits than its factorization.

865388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216351 (or 216349 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 865388 is about 930.2623285934. The cubic root of 865388 is about 95.2950384387.

The spelling of 865388 in words is "eight hundred sixty-five thousand, three hundred eighty-eight".