304428994 has 4 divisors (see below), whose sum is σ = 456643494. Its totient is φ = 152214496.

The previous prime is 304428991. The next prime is 304428997. The reversal of 304428994 is 499824403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499824403 = 13 ⋅38448031.

It is an interprime number because it is at equal distance from previous prime (304428991) and next prime (304428997).

It can be written as a sum of positive squares in only one way, i.e., 225450225 + 78978769 = 15015^2 + 8887^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 304428994.

It is not an unprimeable number, because it can be changed into a prime (304428991) 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 as a sum of consecutive naturals, namely, 76107247 + ... + 76107250.

Almost surely, 2^304428994 is an apocalyptic number.

304428994 is a deficient number, since it is larger than the sum of its proper divisors (152214500).

304428994 is a wasteful number, since it uses less digits than its factorization.

304428994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152214499.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 304428994 is about 17447.8936837660. The cubic root of 304428994 is about 672.7112193825.

The spelling of 304428994 in words is "three hundred four million, four hundred twenty-eight thousand, nine hundred ninety-four".