646204 has 36 divisors (see below), whose sum is σ = 1323784. Its totient is φ = 274176.

The previous prime is 646199. The next prime is 646237. The reversal of 646204 is 402646.

It is a congruent number.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 15007 + ... + 15049.

2⁶⁴⁶²⁰⁴ is an apocalyptic number.

It is an amenable number.

646204 is an abundant number, since it is smaller than the sum of its proper divisors (677580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646204 is a wasteful number, since it uses less digits than its factorization.

646204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 646204 is about 803.8681483925. The cubic root of 646204 is about 86.4549533235.

The spelling of 646204 in words is "six hundred forty-six thousand, two hundred four".