1328378603 has 4 divisors (see below), whose sum is σ = 1329310920. Its totient is φ = 1327446288.

The previous prime is 1328378587. The next prime is 1328378609. The reversal of 1328378603 is 3068738231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1328378603 - 2⁴ = 1328378587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328378609) 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 in 3 ways as a sum of consecutive naturals, for example, 464018 + ... + 466871.

It is an arithmetic number, because the mean of its divisors is an integer number (332327730).

Almost surely, 2^1328378603 is an apocalyptic number.

1328378603 is a deficient number, since it is larger than the sum of its proper divisors (932317).

1328378603 is an equidigital number, since it uses as much as digits as its factorization.

1328378603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932316.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1328378603 is about 36446.9285811576. The cubic root of 1328378603 is about 1099.2773774579.

The spelling of 1328378603 in words is "one billion, three hundred twenty-eight million, three hundred seventy-eight thousand, six hundred three".