646484 has 12 divisors (see below), whose sum is σ = 1180704. Its totient is φ = 309144.

The previous prime is 646453. The next prime is 646519. The reversal of 646484 is 484646.

It is a self number, because there is not a number n which added to its sum of digits gives 646484.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646484.

It is an unprimeable number.

646484 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (98392).

2⁶⁴⁶⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

646484 is a deficient number, since it is larger than the sum of its proper divisors (534220).

646484 is a wasteful number, since it uses less digits than its factorization.

646484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054 (or 7052 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 646484 is about 804.0422874451. The cubic root of 646484 is about 86.4674384888.

The spelling of 646484 in words is "six hundred forty-six thousand, four hundred eighty-four".