860644 has 6 divisors (see below), whose sum is σ = 1506134. Its totient is φ = 430320.

The previous prime is 860641. The next prime is 860647. The reversal of 860644 is 446068.

It is an interprime number because it is at equal distance from previous prime (860641) and next prime (860647).

It can be written as a sum of positive squares in only one way, i.e., 831744 + 28900 = 912^2 + 170^2 .

It is not an unprimeable number, because it can be changed into a prime (860641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107577 + ... + 107584.

2⁸⁶⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

860644 is a deficient number, since it is larger than the sum of its proper divisors (645490).

860644 is a wasteful number, since it uses less digits than its factorization.

860644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215165 (or 215163 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 860644 is about 927.7090061005. The cubic root of 860644 is about 95.1205855622.

It can be divided in two parts, 86064 and 4, that added together give a palindrome (86068).

The spelling of 860644 in words is "eight hundred sixty thousand, six hundred forty-four".