859864 has 16 divisors (see below), whose sum is σ = 1697400. Its totient is φ = 407232.

The previous prime is 859861. The next prime is 859891. The reversal of 859864 is 468958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859861) by changing a digit.

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, 2677 + ... + 2980.

2⁸⁵⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

859864 is a deficient number, since it is larger than the sum of its proper divisors (837536).

859864 is a wasteful number, since it uses less digits than its factorization.

859864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682 (or 5678 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 859864 is about 927.2885203646. The cubic root of 859864 is about 95.0918410089.

The spelling of 859864 in words is "eight hundred fifty-nine thousand, eight hundred sixty-four".