303840434 has 4 divisors (see below), whose sum is σ = 455760654. Its totient is φ = 151920216.

The previous prime is 303840391. The next prime is 303840437. The reversal of 303840434 is 434048303.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434048303 = 13 ⋅33388331.

It can be written as a sum of positive squares in only one way, i.e., 278990209 + 24850225 = 16703^2 + 4985^2 .

It is a junction number, because it is equal to n+sod(n) for n = 303840397 and 303840406.

It is not an unprimeable number, because it can be changed into a prime (303840437) 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, 75960107 + ... + 75960110.

Almost surely, 2^303840434 is an apocalyptic number.

303840434 is a deficient number, since it is larger than the sum of its proper divisors (151920220).

303840434 is a wasteful number, since it uses less digits than its factorization.

303840434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151920219.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 303840434 is about 17431.0193046764. The cubic root of 303840434 is about 672.2774166986.

Adding to 303840434 its reverse (434048303), we get a palindrome (737888737).

The spelling of 303840434 in words is "three hundred three million, eight hundred forty thousand, four hundred thirty-four".