864236 has 12 divisors (see below), whose sum is σ = 1544928. Its totient is φ = 422832.

The previous prime is 864223. The next prime is 864251. The reversal of 864236 is 632468.

It is a junction number, because it is equal to n+sod(n) for n = 864199 and 864208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111 + ... + 2486.

It is an arithmetic number, because the mean of its divisors is an integer number (128744).

2⁸⁶⁴²³⁶ is an apocalyptic number.

It is an amenable number.

864236 is a deficient number, since it is larger than the sum of its proper divisors (680692).

864236 is a wasteful number, since it uses less digits than its factorization.

864236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648 (or 4646 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 864236 is about 929.6429422095. The cubic root of 864236 is about 95.2527342418.

The spelling of 864236 in words is "eight hundred sixty-four thousand, two hundred thirty-six".