646324 has 24 divisors (see below), whose sum is σ = 1326528. Its totient is φ = 269760.

The previous prime is 646309. The next prime is 646339. The reversal of 646324 is 423646.

It is an interprime number because it is at equal distance from previous prime (646309) and next prime (646339).

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 7 ways as a sum of consecutive naturals, for example, 867 + ... + 1429.

It is an arithmetic number, because the mean of its divisors is an integer number (55272).

2⁶⁴⁶³²⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663264).

646324 is an abundant number, since it is smaller than the sum of its proper divisors (680204).

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

646324 is a wasteful number, since it uses less digits than its factorization.

646324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 613 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 646324 is about 803.9427840338. The cubic root of 646324 is about 86.4603045501.

The spelling of 646324 in words is "six hundred forty-six thousand, three hundred twenty-four".