646382 has 12 divisors (see below), whose sum is σ = 1066128. Its totient is φ = 293700.

The previous prime is 646379. The next prime is 646397. The reversal of 646382 is 283646.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1094 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (88844).

2⁶⁴⁶³⁸² is an apocalyptic number.

646382 is a deficient number, since it is larger than the sum of its proper divisors (419746).

646382 is a wasteful number, since it uses less digits than its factorization.

646382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695 (or 2684 counting only the distinct ones).

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

The square root of 646382 is about 803.9788554434. The cubic root of 646382 is about 86.4628907389.

It can be divided in two parts, 64 and 6382, that added together give a palindrome (6446).

The spelling of 646382 in words is "six hundred forty-six thousand, three hundred eighty-two".