305418 has 16 divisors (see below), whose sum is σ = 617760. Its totient is φ = 100656.

The previous prime is 305413. The next prime is 305419. The reversal of 305418 is 814503.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 305394 and 305403.

It is not an unprimeable number, because it can be changed into a prime (305411) by changing a digit.

305418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 421 + ... + 887.

It is an arithmetic number, because the mean of its divisors is an integer number (38610).

2³⁰⁵⁴¹⁸ is an apocalyptic number.

305418 is an abundant number, since it is smaller than the sum of its proper divisors (312342).

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

305418 is a wasteful number, since it uses less digits than its factorization.

305418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 305418 is about 552.6463607046. The cubic root of 305418 is about 67.3438916445.

The spelling of 305418 in words is "three hundred five thousand, four hundred eighteen".