305330240 has 28 divisors (see below), whose sum is σ = 727068396. Its totient is φ = 122131968.

The previous prime is 305330231. The next prime is 305330257. The reversal of 305330240 is 42033503.

It can be written as a sum of positive squares in 2 ways, for example, as 50353216 + 254977024 = 7096^2 + 15968^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 476759 + ... + 477398.

Almost surely, 2^305330240 is an apocalyptic number.

It is an amenable number.

305330240 is an abundant number, since it is smaller than the sum of its proper divisors (421738156).

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

305330240 is an equidigital number, since it uses as much as digits as its factorization.

305330240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954174 (or 954164 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 305330240 is about 17473.7013823632. The cubic root of 305330240 is about 673.3744074106.

Adding to 305330240 its reverse (42033503), we get a palindrome (347363743).

The spelling of 305330240 in words is "three hundred five million, three hundred thirty thousand, two hundred forty".