864830 has 16 divisors (see below), whose sum is σ = 1568160. Its totient is φ = 343392.

The previous prime is 864817. The next prime is 864883. The reversal of 864830 is 38468.

It is a junction number, because it is equal to n+sod(n) for n = 864793 and 864802.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864830.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 1751 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (98010).

2⁸⁶⁴⁸³⁰ is an apocalyptic number.

864830 is a deficient number, since it is larger than the sum of its proper divisors (703330).

864830 is a wasteful number, since it uses less digits than its factorization.

864830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 864830 is about 929.9623648299. The cubic root of 864830 is about 95.2745520348.

The spelling of 864830 in words is "eight hundred sixty-four thousand, eight hundred thirty".