866260 has 12 divisors (see below), whose sum is σ = 1819188. Its totient is φ = 346496.

The previous prime is 866231. The next prime is 866279. The reversal of 866260 is 62668.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 669124 + 197136 = 818^2 + 444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21637 + ... + 21676.

It is an arithmetic number, because the mean of its divisors is an integer number (151599).

2⁸⁶⁶²⁶⁰ is an apocalyptic number.

It is an amenable number.

866260 is an abundant number, since it is smaller than the sum of its proper divisors (952928).

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

866260 is a wasteful number, since it uses less digits than its factorization.

866260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43322 (or 43320 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 866260 is about 930.7308955869. The cubic root of 866260 is about 95.3270354075.

The spelling of 866260 in words is "eight hundred sixty-six thousand, two hundred sixty".