864786 has 16 divisors (see below), whose sum is σ = 1862784. Its totient is φ = 266064.

The previous prime is 864781. The next prime is 864793. The reversal of 864786 is 687468.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (864781) by changing a digit.

864786 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 7 ways as a sum of consecutive naturals, for example, 5466 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

2⁸⁶⁴⁷⁸⁶ is an apocalyptic number.

864786 is an abundant number, since it is smaller than the sum of its proper divisors (997998).

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

864786 is a wasteful number, since it uses less digits than its factorization.

864786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11105.

The product of its digits is 64512, while the sum is 39.

The square root of 864786 is about 929.9387076577. The cubic root of 864786 is about 95.2729362446.

The spelling of 864786 in words is "eight hundred sixty-four thousand, seven hundred eighty-six".