866376 has 80 divisors (see below), whose sum is σ = 2787840. Its totient is φ = 246240.

The previous prime is 866353. The next prime is 866389. The reversal of 866376 is 673668.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (36288) is a multiple of the sum of its prime factors (216).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 866376.

It is an unprimeable number.

866376 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 19 ways as a sum of consecutive naturals, for example, 4441 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (34848).

2⁸⁶⁶³⁷⁶ 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 866376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393920).

866376 is an abundant number, since it is smaller than the sum of its proper divisors (1921464).

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

866376 is a wasteful number, since it uses less digits than its factorization.

866376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 203 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 866376 is about 930.7932101170. The cubic root of 866376 is about 95.3312902665.

The spelling of 866376 in words is "eight hundred sixty-six thousand, three hundred seventy-six".