646336 has 14 divisors (see below), whose sum is σ = 1282700. Its totient is φ = 323136.

The previous prime is 646309. The next prime is 646339. The reversal of 646336 is 633646.

646336 is a modest number, since divided by 6336 gives 64 as remainder.

It is not an unprimeable number, because it can be changed into a prime (646339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986 + ... + 5113.

2⁶⁴⁶³³⁶ is an apocalyptic number.

It is an amenable number.

646336 is a deficient number, since it is larger than the sum of its proper divisors (636364).

646336 is a wasteful number, since it uses less digits than its factorization.

646336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111 (or 10101 counting only the distinct ones).

The product of its digits is 7776, while the sum is 28.

The square root of 646336 is about 803.9502472168. The cubic root of 646336 is about 86.4608396364.

It can be divided in two parts, 64 and 6336, that multiplied together give a palindrome (405504).

The spelling of 646336 in words is "six hundred forty-six thousand, three hundred thirty-six".