304121216 has 64 divisors (see below), whose sum is σ = 697973760. Its totient is φ = 129292800.

The previous prime is 304121189. The next prime is 304121281. The reversal of 304121216 is 612121403.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116081 + ... + 118671.

It is an arithmetic number, because the mean of its divisors is an integer number (10905840).

Almost surely, 2^304121216 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 304121216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348986880).

304121216 is an abundant number, since it is smaller than the sum of its proper divisors (393852544).

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

304121216 is a wasteful number, since it uses less digits than its factorization.

304121216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 304121216 is about 17439.0715349184. The cubic root of 304121216 is about 672.4844390479.

Adding to 304121216 its reverse (612121403), we get a palindrome (916242619).

The spelling of 304121216 in words is "three hundred four million, one hundred twenty-one thousand, two hundred sixteen".