305648 has 20 divisors (see below), whose sum is σ = 677040. Its totient is φ = 130944.

The previous prime is 305639. The next prime is 305663. The reversal of 305648 is 846503.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305648.

It is an unprimeable number.

305648 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 3 ways as a sum of consecutive naturals, for example, 1253 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (33852).

2³⁰⁵⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

305648 is an abundant number, since it is smaller than the sum of its proper divisors (371392).

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

305648 is a wasteful number, since it uses less digits than its factorization.

305648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744 (or 2738 counting only the distinct ones).

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

The square root of 305648 is about 552.8544112151. The cubic root of 305648 is about 67.3607922077.

The spelling of 305648 in words is "three hundred five thousand, six hundred forty-eight".