304312540 has 108 divisors (see below), whose sum is σ = 778442616. Its totient is φ = 99629376.

The previous prime is 304312499. The next prime is 304312543. The reversal of 304312540 is 45213403.

It is a super-2 number, since 2×304312540² = 185212244002503200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304312543) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 518127 + ... + 518713.

It is an arithmetic number, because the mean of its divisors is an integer number (7207802).

Almost surely, 2^304312540 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 304312540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389221308).

304312540 is an abundant number, since it is smaller than the sum of its proper divisors (474130076).

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

304312540 is a wasteful number, since it uses less digits than its factorization.

304312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 304312540 is about 17444.5561709090. The cubic root of 304312540 is about 672.6254304627.

Adding to 304312540 its reverse (45213403), we get a palindrome (349525943).

The spelling of 304312540 in words is "three hundred four million, three hundred twelve thousand, five hundred forty".