304431406 has 16 divisors (see below), whose sum is σ = 461830320. Its totient is φ = 150497280.

The previous prime is 304431403. The next prime is 304431409. The reversal of 304431406 is 604134403.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (304431403) and next prime (304431409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304431403) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69316 + ... + 73576.

It is an arithmetic number, because the mean of its divisors is an integer number (28864395).

Almost surely, 2^304431406 is an apocalyptic number.

304431406 is a deficient number, since it is larger than the sum of its proper divisors (157398914).

304431406 is a wasteful number, since it uses less digits than its factorization.

304431406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 304431406 is about 17447.9628037201. The cubic root of 304431406 is about 672.7129960148.

Adding to 304431406 its reverse (604134403), we get a palindrome (908565809).

The spelling of 304431406 in words is "three hundred four million, four hundred thirty-one thousand, four hundred six".