860866 has 4 divisors (see below), whose sum is σ = 1291302. Its totient is φ = 430432.

The previous prime is 860861. The next prime is 860887. The reversal of 860866 is 668068.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 335241 = 725^2 + 579^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215215 + ... + 215218.

2⁸⁶⁰⁸⁶⁶ is an apocalyptic number.

860866 is a deficient number, since it is larger than the sum of its proper divisors (430436).

860866 is a wasteful number, since it uses less digits than its factorization.

860866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430435.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 860866 is about 927.8286479733. The cubic root of 860866 is about 95.1287635292.

The spelling of 860866 in words is "eight hundred sixty thousand, eight hundred sixty-six".