648306 has 12 divisors (see below), whose sum is σ = 1404702. Its totient is φ = 216096.

The previous prime is 648293. The next prime is 648317. The reversal of 648306 is 603846.

648306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 549081 + 99225 = 741^2 + 315^2 .

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 648306.

It is a congruent number.

It is an unprimeable number.

648306 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17991 + ... + 18026.

2⁶⁴⁸³⁰⁶ is an apocalyptic number.

648306 is an abundant number, since it is smaller than the sum of its proper divisors (756396).

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

648306 is a wasteful number, since it uses less digits than its factorization.

648306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36025 (or 36022 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 648306 is about 805.1745152450. The cubic root of 648306 is about 86.5485933209.

The spelling of 648306 in words is "six hundred forty-eight thousand, three hundred six".