648305 has 8 divisors (see below), whose sum is σ = 889152. Its totient is φ = 444528.

The previous prime is 648293. The next prime is 648317. The reversal of 648305 is 503846.

648305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (648293) and next prime (648317).

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

It is not a de Polignac number, because 648305 - 2⁴ = 648289 is a prime.

It is a Duffinian 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, 9227 + ... + 9296.

It is an arithmetic number, because the mean of its divisors is an integer number (111144).

2⁶⁴⁸³⁰⁵ is an apocalyptic number.

It is an amenable number.

648305 is a deficient number, since it is larger than the sum of its proper divisors (240847).

648305 is a wasteful number, since it uses less digits than its factorization.

648305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18535.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 648305 is about 805.1738942614. The cubic root of 648305 is about 86.5485488210.

The spelling of 648305 in words is "six hundred forty-eight thousand, three hundred five".