304323240 has 128 divisors (see below), whose sum is σ = 987719040. Its totient is φ = 74566656.

The previous prime is 304323199. The next prime is 304323251. The reversal of 304323240 is 42323403.

It is a super-2 number, since 2×304323240² = 185225268808195200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581619 + ... + 582141.

It is an arithmetic number, because the mean of its divisors is an integer number (7716555).

Almost surely, 2^304323240 is an apocalyptic number.

304323240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304323240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493859520).

304323240 is an abundant number, since it is smaller than the sum of its proper divisors (683395800).

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

304323240 is a wasteful number, since it uses less digits than its factorization.

304323240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 304323240 is about 17444.8628541471. The cubic root of 304323240 is about 672.6333138138.

Adding to 304323240 its reverse (42323403), we get a palindrome (346646643).

It can be divided in two parts, 30 and 4323240, that added together give a triangular number (4323270 = T₂₉₄₀).

The spelling of 304323240 in words is "three hundred four million, three hundred twenty-three thousand, two hundred forty".