864356 has 12 divisors (see below), whose sum is σ = 1519980. Its totient is φ = 430080.

The previous prime is 864341. The next prime is 864359. The reversal of 864356 is 653468.

Added to its reverse (653468) it gives a square (1517824 = 1232²).

It can be written as a sum of positive squares in 2 ways, for example, as 462400 + 401956 = 680^2 + 634^2 .

It is a super-2 number, since 2×864356² = 1494222589472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (864359) by changing a digit.

864356 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740 + ... + 1508.

It is an arithmetic number, because the mean of its divisors is an integer number (126665).

2⁸⁶⁴³⁵⁶ is an apocalyptic number.

It is an amenable number.

864356 is a deficient number, since it is larger than the sum of its proper divisors (655624).

864356 is a wasteful number, since it uses less digits than its factorization.

864356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1052 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 864356 is about 929.7074808777. The cubic root of 864356 is about 95.2571426824.

Adding to 864356 its reverse (653468), we get a square (1517824 = 1232²).

The spelling of 864356 in words is "eight hundred sixty-four thousand, three hundred fifty-six".