864862 has 8 divisors (see below), whose sum is σ = 1307592. Its totient is φ = 429000.

The previous prime is 864817. The next prime is 864883. The reversal of 864862 is 268468.

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

It is a congruent number.

It is an unprimeable number.

864862 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1389 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (163449).

2⁸⁶⁴⁸⁶² is an apocalyptic number.

864862 is a deficient number, since it is larger than the sum of its proper divisors (442730).

864862 is a wasteful number, since it uses less digits than its factorization.

864862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434.

The product of its digits is 18432, while the sum is 34.

The square root of 864862 is about 929.9795696681. The cubic root of 864862 is about 95.2757271204.

The spelling of 864862 in words is "eight hundred sixty-four thousand, eight hundred sixty-two".