• 304 can be written using four 4's:

304 has 10 divisors (see below), whose sum is σ = 620. Its totient is φ = 144.

The previous prime is 293. The next prime is 307. The reversal of 304 is 403.

304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 6, base 9, base 11 and base 14.

It is not an unprimeable number, because it can be changed into a prime (307) by changing a digit.

304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7 + ... + 25.

It is an arithmetic number, because the mean of its divisors is an integer number (62).

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310).

304 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

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

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

The sum of its prime factors is 27 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 304 is about 17.4355957742. The cubic root of 304 is about 6.7239508136.

Subtracting from 304 its product of nonzero digits (12), we obtain a palindrome (292).

Adding to 304 its reverse (403), we get a palindrome (707).

Subtracting 304 from its reverse (403), we obtain a palindrome (99).

It can be divided in two parts, 30 and 4, that multiplied together give a triangular number (120 = T_{15}).

The spelling of 304 in words is "three hundred four", and thus it is an aban number and an iban number.

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