866346 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 256704.

The previous prime is 866329. The next prime is 866353. The reversal of 866346 is 643668.

It is a congruent number.

It is an unprimeable number.

866346 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, 2071 + ... + 2453.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁸⁶⁶³⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967680).

866346 is an abundant number, since it is smaller than the sum of its proper divisors (1069014).

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

866346 is a wasteful number, since it uses less digits than its factorization.

866346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 20736, while the sum is 33.

The square root of 866346 is about 930.7770946902. Note that the first 3 decimals coincide. The cubic root of 866346 is about 95.3301899084.

The spelling of 866346 in words is "eight hundred sixty-six thousand, three hundred forty-six".