1328947718 has 24 divisors (see below), whose sum is σ = 2321241552. Its totient is φ = 568968624.

The previous prime is 1328947673. The next prime is 1328947727. The reversal of 1328947718 is 8177498231.

It is a happy number.

It is a super-2 number, since 2×1328947718² = 3532204074354815048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 97796 + ... + 110552.

It is an arithmetic number, because the mean of its divisors is an integer number (96718398).

Almost surely, 2^1328947718 is an apocalyptic number.

1328947718 is a deficient number, since it is larger than the sum of its proper divisors (992293834).

1328947718 is a wasteful number, since it uses less digits than its factorization.

1328947718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13836 (or 13829 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 1328947718 is about 36454.7351931131. The cubic root of 1328947718 is about 1099.4343422271.

The spelling of 1328947718 in words is "one billion, three hundred twenty-eight million, nine hundred forty-seven thousand, seven hundred eighteen".