305480 has 32 divisors (see below), whose sum is σ = 786240. Its totient is φ = 104640.

The previous prime is 305479. The next prime is 305483. The reversal of 305480 is 84503.

305480 = T₉₉ + T₁₀₀ + ... + T₁₄₀.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 266 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2³⁰⁵⁴⁸⁰ is an apocalyptic number.

It is an amenable number.

305480 is an abundant number, since it is smaller than the sum of its proper divisors (480760).

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

305480 is a wasteful number, since it uses less digits than its factorization.

305480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 305480 is about 552.7024515958. The cubic root of 305480 is about 67.3484482836.

Adding to 305480 its reverse (84503), we get a palindrome (389983).

The spelling of 305480 in words is "three hundred five thousand, four hundred eighty".