304040493 has 8 divisors (see below), whose sum is σ = 450430400. Its totient is φ = 202693644.

The previous prime is 304040483. The next prime is 304040497. The reversal of 304040493 is 394040403.

It is not a de Polignac number, because 304040493 - 2²² = 299846189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 11260759 = 304040493 / (3 + 0 + 4 + 0 + 4 + 0 + 4 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304040497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5630353 + ... + 5630406.

It is an arithmetic number, because the mean of its divisors is an integer number (56303800).

Almost surely, 2^304040493 is an apocalyptic number.

It is an amenable number.

304040493 is a deficient number, since it is larger than the sum of its proper divisors (146389907).

304040493 is a wasteful number, since it uses less digits than its factorization.

304040493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11260768 (or 11260762 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 304040493 is about 17436.7569519105. The cubic root of 304040493 is about 672.4249345234.

Adding to 304040493 its reverse (394040403), we get a palindrome (698080896).

The spelling of 304040493 in words is "three hundred four million, forty thousand, four hundred ninety-three".