865488 has 80 divisors (see below), whose sum is σ = 2569280. Its totient is φ = 248832.

The previous prime is 865483. The next prime is 865493. The reversal of 865488 is 884568.

865488 is nontrivially palindromic in base 7.

It is an interprime number because it is at equal distance from previous prime (865483) and next prime (865493).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865481) by changing a digit.

865488 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 15 ways as a sum of consecutive naturals, for example, 11820 + ... + 11892.

It is an arithmetic number, because the mean of its divisors is an integer number (32116).

2⁸⁶⁵⁴⁸⁸ 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 865488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284640).

865488 is an abundant number, since it is smaller than the sum of its proper divisors (1703792).

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

865488 is a wasteful number, since it uses less digits than its factorization.

865488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 110 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 865488 is about 930.3160753206. The cubic root of 865488 is about 95.2987089067.

The spelling of 865488 in words is "eight hundred sixty-five thousand, four hundred eighty-eight".