305020 has 24 divisors (see below), whose sum is σ = 651168. Its totient is φ = 120000.

The previous prime is 305017. The next prime is 305021. The reversal of 305020 is 20503.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 304988 and 305006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 2095.

It is an arithmetic number, because the mean of its divisors is an integer number (27132).

2³⁰⁵⁰²⁰ is an apocalyptic number.

It is an amenable number.

305020 is an abundant number, since it is smaller than the sum of its proper divisors (346148).

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

305020 is a wasteful number, since it uses less digits than its factorization.

305020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 305020 is about 552.2861577117. The cubic root of 305020 is about 67.3146262663.

Adding to 305020 its reverse (20503), we get a palindrome (325523).

It can be divided in two parts, 30 and 5020, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 305020 in words is "three hundred five thousand, twenty".