868385 has 16 divisors (see below), whose sum is σ = 1220736. Its totient is φ = 580608.

The previous prime is 868381. The next prime is 868397. The reversal of 868385 is 583868.

It is a happy number.

It is not a de Polignac number, because 868385 - 2² = 868381 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868385.

It is not an unprimeable number, because it can be changed into a prime (868381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1217 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (76296).

2⁸⁶⁸³⁸⁵ is an apocalyptic number.

It is an amenable number.

868385 is a deficient number, since it is larger than the sum of its proper divisors (352351).

868385 is a wasteful number, since it uses less digits than its factorization.

868385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

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

The square root of 868385 is about 931.8717722949. The cubic root of 868385 is about 95.4049198517.

The spelling of 868385 in words is "eight hundred sixty-eight thousand, three hundred eighty-five".