646334 has 8 divisors (see below), whose sum is σ = 1044120. Its totient is φ = 298296.

The previous prime is 646309. The next prime is 646339. The reversal of 646334 is 433646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 24859 = 646334 / (6 + 4 + 6 + 3 + 3 + 4).

It is a congruent number.

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

646334 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12404 + ... + 12455.

It is an arithmetic number, because the mean of its divisors is an integer number (130515).

2⁶⁴⁶³³⁴ is an apocalyptic number.

646334 is a deficient number, since it is larger than the sum of its proper divisors (397786).

646334 is a wasteful number, since it uses less digits than its factorization.

646334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24874.

The product of its digits is 5184, while the sum is 26.

The square root of 646334 is about 803.9490033578. The cubic root of 646334 is about 86.4607504558.

The spelling of 646334 in words is "six hundred forty-six thousand, three hundred thirty-four".