864406 has 4 divisors (see below), whose sum is σ = 1296612. Its totient is φ = 432202.

The previous prime is 864379. The next prime is 864407. The reversal of 864406 is 604468.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864407) by changing a digit.

864406 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 as a sum of consecutive naturals, namely, 216100 + ... + 216103.

It is an arithmetic number, because the mean of its divisors is an integer number (324153).

2⁸⁶⁴⁴⁰⁶ is an apocalyptic number.

864406 is a deficient number, since it is larger than the sum of its proper divisors (432206).

864406 is a wasteful number, since it uses less digits than its factorization.

864406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432205.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 864406 is about 929.7343706672. The cubic root of 864406 is about 95.2589794122.

The spelling of 864406 in words is "eight hundred sixty-four thousand, four hundred six".