304542240 has 96 divisors (see below), whose sum is σ = 977489856. Its totient is φ = 79672320.

The previous prime is 304542239. The next prime is 304542299. The reversal of 304542240 is 42245403.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 304542240.

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 15 ways as a sum of consecutive naturals, for example, 19455 + ... + 31425.

It is an arithmetic number, because the mean of its divisors is an integer number (10182186).

Almost surely, 2^304542240 is an apocalyptic number.

304542240 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 304542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488744928).

304542240 is an abundant number, since it is smaller than the sum of its proper divisors (672947616).

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

304542240 is a wasteful number, since it uses less digits than its factorization.

304542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12042 (or 12034 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 304542240 is about 17451.1386447991. The cubic root of 304542240 is about 672.7946240645.

Adding to 304542240 its reverse (42245403), we get a palindrome (346787643).

The spelling of 304542240 in words is "three hundred four million, five hundred forty-two thousand, two hundred forty".