864445 has 8 divisors (see below), whose sum is σ = 1050336. Its totient is φ = 682896.

The previous prime is 864439. The next prime is 864449. The reversal of 864445 is 544468.

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

It is a cyclic number.

It is not a de Polignac number, because 864445 - 2¹¹ = 862397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864449) 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 7 ways as a sum of consecutive naturals, for example, 627 + ... + 1456.

It is an arithmetic number, because the mean of its divisors is an integer number (131292).

2⁸⁶⁴⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

864445 is a deficient number, since it is larger than the sum of its proper divisors (185891).

864445 is a wasteful number, since it uses less digits than its factorization.

864445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its digits is 15360, while the sum is 31.

The square root of 864445 is about 929.7553441632. The cubic root of 864445 is about 95.2604120123.

The spelling of 864445 in words is "eight hundred sixty-four thousand, four hundred forty-five".