869385 has 24 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 420640.

The previous prime is 869381. The next prime is 869399. The reversal of 869385 is 583968.

It is not a de Polignac number, because 869385 - 2² = 869381 is a prime.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (869381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1576 + ... + 2054.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2⁸⁶⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

869385 is a deficient number, since it is larger than the sum of its proper divisors (662775).

869385 is a wasteful number, since it uses less digits than its factorization.

869385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 498 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 869385 is about 932.4081724224. The cubic root of 869385 is about 95.4415273939.

It can be divided in two parts, 8693 and 85, that added together give a palindrome (8778).

The spelling of 869385 in words is "eight hundred sixty-nine thousand, three hundred eighty-five".