866340 has 36 divisors (see below), whose sum is σ = 2628444. Its totient is φ = 230976.

The previous prime is 866329. The next prime is 866353. The reversal of 866340 is 43668.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 381924 = 696^2 + 618^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

866340 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 11 ways as a sum of consecutive naturals, for example, 2227 + ... + 2586.

2⁸⁶⁶³⁴⁰ is an apocalyptic number.

It is an amenable number.

866340 is an abundant number, since it is smaller than the sum of its proper divisors (1762104).

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

866340 is a wasteful number, since it uses less digits than its factorization.

866340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 866340 is about 930.7738715714. The cubic root of 866340 is about 95.3299698337.

The spelling of 866340 in words is "eight hundred sixty-six thousand, three hundred forty".