305500 has 48 divisors (see below), whose sum is σ = 733824. Its totient is φ = 110400.

The previous prime is 305497. The next prime is 305521. The reversal of 305500 is 5503.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6477 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (15288).

2³⁰⁵⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366912).

305500 is an abundant number, since it is smaller than the sum of its proper divisors (428324).

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

305500 is a wasteful number, since it uses less digits than its factorization.

305500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 305500 is about 552.7205442174. The cubic root of 305500 is about 67.3499180357.

The spelling of 305500 in words is "three hundred five thousand, five hundred".