305488 has 20 divisors (see below), whose sum is σ = 603508. Its totient is φ = 149760.

The previous prime is 305483. The next prime is 305489. The reversal of 305488 is 884503.

It can be written as a sum of positive squares in 2 ways, for example, as 5184 + 300304 = 72^2 + 548^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820 + ... + 1132.

2³⁰⁵⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

305488 is a deficient number, since it is larger than the sum of its proper divisors (298020).

305488 is a wasteful number, since it uses less digits than its factorization.

305488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 305488 is about 552.7096887155. The cubic root of 305488 is about 67.3490361921.

The spelling of 305488 in words is "three hundred five thousand, four hundred eighty-eight".