1328368646 has 16 divisors (see below), whose sum is σ = 2184003648. Its totient is φ = 600940200.

The previous prime is 1328368597. The next prime is 1328368681. The reversal of 1328368646 is 6468638231.

It is a self number, because there is not a number n which added to its sum of digits gives 1328368646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138440 + ... + 147723.

It is an arithmetic number, because the mean of its divisors is an integer number (136500228).

Almost surely, 2^1328368646 is an apocalyptic number.

1328368646 is a deficient number, since it is larger than the sum of its proper divisors (855635002).

1328368646 is a wasteful number, since it uses less digits than its factorization.

1328368646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286387.

The product of its digits is 995328, while the sum is 47.

The square root of 1328368646 is about 36446.7919850294. The cubic root of 1328368646 is about 1099.2746308684.

The spelling of 1328368646 in words is "one billion, three hundred twenty-eight million, three hundred sixty-eight thousand, six hundred forty-six".