304144021 has 8 divisors (see below), whose sum is σ = 308992544. Its totient is φ = 299304720.

The previous prime is 304143989. The next prime is 304144063. The reversal of 304144021 is 120441403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 304144021 - 2⁵ = 304143989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 304144021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304144081) 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 7 ways as a sum of consecutive naturals, for example, 97831 + ... + 100891.

It is an arithmetic number, because the mean of its divisors is an integer number (38624068).

Almost surely, 2^304144021 is an apocalyptic number.

It is an amenable number.

304144021 is a deficient number, since it is larger than the sum of its proper divisors (4848523).

304144021 is a wasteful number, since it uses less digits than its factorization.

304144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 304144021 is about 17439.7253705441. The cubic root of 304144021 is about 672.5012477232.

Adding to 304144021 its reverse (120441403), we get a palindrome (424585424).

The spelling of 304144021 in words is "three hundred four million, one hundred forty-four thousand, twenty-one".