864818 has 8 divisors (see below), whose sum is σ = 1304940. Its totient is φ = 429840.

The previous prime is 864817. The next prime is 864883. The reversal of 864818 is 818468.

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 187489 = 823^2 + 433^2 .

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

It is not an unprimeable number, because it can be changed into a prime (864811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833 + ... + 1556.

2⁸⁶⁴⁸¹⁸ is an apocalyptic number.

864818 is a deficient number, since it is larger than the sum of its proper divisors (440122).

864818 is a wasteful number, since it uses less digits than its factorization.

864818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572.

The product of its digits is 12288, while the sum is 35.

The square root of 864818 is about 929.9559129335. The cubic root of 864818 is about 95.2741113701.

The spelling of 864818 in words is "eight hundred sixty-four thousand, eight hundred eighteen".