304313240 has 128 divisors (see below), whose sum is σ = 883353600. Its totient is φ = 91553280.

The previous prime is 304313239. The next prime is 304313281. The reversal of 304313240 is 42313403.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87617 + ... + 91023.

It is an arithmetic number, because the mean of its divisors is an integer number (6901200).

Almost surely, 2^304313240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304313240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441676800).

304313240 is an abundant number, since it is smaller than the sum of its proper divisors (579040360).

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

304313240 is a wasteful number, since it uses less digits than its factorization.

304313240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3461 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 304313240 is about 17444.5762344632. The cubic root of 304313240 is about 672.6259462016.

Adding to 304313240 its reverse (42313403), we get a palindrome (346626643).

The spelling of 304313240 in words is "three hundred four million, three hundred thirteen thousand, two hundred forty".