864670 has 8 divisors (see below), whose sum is σ = 1556424. Its totient is φ = 345864.

The previous prime is 864641. The next prime is 864673. The reversal of 864670 is 76468.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864673) 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, 43224 + ... + 43243.

It is an arithmetic number, because the mean of its divisors is an integer number (194553).

2⁸⁶⁴⁶⁷⁰ is an apocalyptic number.

864670 is a deficient number, since it is larger than the sum of its proper divisors (691754).

864670 is a wasteful number, since it uses less digits than its factorization.

864670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86474.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 864670 is about 929.8763358641. The cubic root of 864670 is about 95.2686761715.

The spelling of 864670 in words is "eight hundred sixty-four thousand, six hundred seventy".