646376 has 16 divisors (see below), whose sum is σ = 1240800. Its totient is φ = 315504.

The previous prime is 646339. The next prime is 646379. The reversal of 646376 is 673646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646379) by changing a digit.

646376 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, 596 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (77550).

2⁶⁴⁶³⁷⁶ is an apocalyptic number.

It is an amenable number.

646376 is a deficient number, since it is larger than the sum of its proper divisors (594424).

646376 is a wasteful number, since it uses less digits than its factorization.

646376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928 (or 1924 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 646376 is about 803.9751239933. The cubic root of 646376 is about 86.4626232093.

The spelling of 646376 in words is "six hundred forty-six thousand, three hundred seventy-six".