1320345436 has 6 divisors (see below), whose sum is σ = 2310604520. Its totient is φ = 660172716.

The previous prime is 1320345431. The next prime is 1320345451. The reversal of 1320345436 is 6345430231.

It is a junction number, because it is equal to n+sod(n) for n = 1320345398 and 1320345407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320345431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165043176 + ... + 165043183.

Almost surely, 2^1320345436 is an apocalyptic number.

It is an amenable number.

1320345436 is a deficient number, since it is larger than the sum of its proper divisors (990259084).

1320345436 is a wasteful number, since it uses less digits than its factorization.

1320345436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330086363 (or 330086361 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 1320345436 is about 36336.5578446831. The cubic root of 1320345436 is about 1097.0569915162.

Adding to 1320345436 its reverse (6345430231), we get a palindrome (7665775667).

The spelling of 1320345436 in words is "one billion, three hundred twenty million, three hundred forty-five thousand, four hundred thirty-six".