1328678945 has 24 divisors (see below), whose sum is σ = 1847717568. Its totient is φ = 909459200.

The previous prime is 1328678933. The next prime is 1328678951. The reversal of 1328678945 is 5498768231.

It is not a de Polignac number, because 1328678945 - 2⁴ = 1328678929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 25901 + ... + 57690.

It is an arithmetic number, because the mean of its divisors is an integer number (76988232).

Almost surely, 2^1328678945 is an apocalyptic number.

It is an amenable number.

1328678945 is a deficient number, since it is larger than the sum of its proper divisors (519038623).

1328678945 is a wasteful number, since it uses less digits than its factorization.

1328678945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83641 (or 83624 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 1328678945 is about 36451.0486131744. The cubic root of 1328678945 is about 1099.3602188722.

The spelling of 1328678945 in words is "one billion, three hundred twenty-eight million, six hundred seventy-eight thousand, nine hundred forty-five".