866486 has 8 divisors (see below), whose sum is σ = 1312200. Its totient is φ = 429088.

The previous prime is 866477. The next prime is 866513. The reversal of 866486 is 684668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (164025).

2⁸⁶⁶⁴⁸⁶ is an apocalyptic number.

866486 is a deficient number, since it is larger than the sum of its proper divisors (445714).

866486 is a wasteful number, since it uses less digits than its factorization.

866486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158.

The product of its digits is 55296, while the sum is 38.

The square root of 866486 is about 930.8522976284. The cubic root of 866486 is about 95.3353246958.

The spelling of 866486 in words is "eight hundred sixty-six thousand, four hundred eighty-six".