1328731747 has 8 divisors (see below), whose sum is σ = 1607877216. Its totient is φ = 1071917952.

The previous prime is 1328731727. The next prime is 1328731757. The reversal of 1328731747 is 7471378231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1328731747 - 2¹⁵ = 1328698979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328731727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5582788 + ... + 5583025.

It is an arithmetic number, because the mean of its divisors is an integer number (200984652).

Almost surely, 2^1328731747 is an apocalyptic number.

1328731747 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1328731747 is a deficient number, since it is larger than the sum of its proper divisors (279145469).

1328731747 is a wasteful number, since it uses less digits than its factorization.

1328731747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165837.

The product of its digits is 197568, while the sum is 43.

The square root of 1328731747 is about 36451.7728924122. The cubic root of 1328731747 is about 1099.3747816201.

The spelling of 1328731747 in words is "one billion, three hundred twenty-eight million, seven hundred thirty-one thousand, seven hundred forty-seven".