305380 has 12 divisors (see below), whose sum is σ = 641340. Its totient is φ = 122144.

The previous prime is 305377. The next prime is 305401. The reversal of 305380 is 83503.

305380 = T₃₄₇ + T₃₄₈ + ... + T₃₅₁.

It can be written as a sum of positive squares in 2 ways, for example, as 123904 + 181476 = 352^2 + 426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7615 + ... + 7654.

It is an arithmetic number, because the mean of its divisors is an integer number (53445).

2³⁰⁵³⁸⁰ is an apocalyptic number.

It is an amenable number.

305380 is an abundant number, since it is smaller than the sum of its proper divisors (335960).

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

305380 is a wasteful number, since it uses less digits than its factorization.

305380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15278 (or 15276 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 305380 is about 552.6119796023. The cubic root of 305380 is about 67.3410985609.

Adding to 305380 its reverse (83503), we get a palindrome (388883).

The spelling of 305380 in words is "three hundred five thousand, three hundred eighty".