648530 has 8 divisors (see below), whose sum is σ = 1167372. Its totient is φ = 259408.

The previous prime is 648509. The next prime is 648563. The reversal of 648530 is 35846.

648530 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 2 ways, for example, as 644809 + 3721 = 803^2 + 61^2 .

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

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 648530.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648530.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32417 + ... + 32436.

2⁶⁴⁸⁵³⁰ is an apocalyptic number.

648530 is a deficient number, since it is larger than the sum of its proper divisors (518842).

648530 is a wasteful number, since it uses less digits than its factorization.

648530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64860.

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

The square root of 648530 is about 805.3136035111. The cubic root of 648530 is about 86.5585601434.

The spelling of 648530 in words is "six hundred forty-eight thousand, five hundred thirty".