646326 has 16 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 215424.

The previous prime is 646309. The next prime is 646339. The reversal of 646326 is 623646.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5931 + ... + 6038.

It is an arithmetic number, because the mean of its divisors is an integer number (89775).

2⁶⁴⁶³²⁶ is an apocalyptic number.

646326 is an abundant number, since it is smaller than the sum of its proper divisors (790074).

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

646326 is a wasteful number, since it uses less digits than its factorization.

646326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980 (or 11974 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 646326 is about 803.9440279024. The cubic root of 646326 is about 86.4603937316.

The spelling of 646326 in words is "six hundred forty-six thousand, three hundred twenty-six".