646330 has 8 divisors (see below), whose sum is σ = 1163412. Its totient is φ = 258528.

The previous prime is 646309. The next prime is 646339. The reversal of 646330 is 33646.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 1521 = 803^2 + 39^2 .

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

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32307 + ... + 32326.

2⁶⁴⁶³³⁰ is an apocalyptic number.

646330 is a deficient number, since it is larger than the sum of its proper divisors (517082).

646330 is a wasteful number, since it uses less digits than its factorization.

646330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64640.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 646330 is about 803.9465156340. The cubic root of 646330 is about 86.4605720941.

Adding to 646330 its reverse (33646), we get a palindrome (679976).

The spelling of 646330 in words is "six hundred forty-six thousand, three hundred thirty".