1328431818 has 32 divisors (see below), whose sum is σ = 3037541760. Its totient is φ = 379411200.

The previous prime is 1328431817. The next prime is 1328431837. The reversal of 1328431818 is 8181348231.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1328431817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172678 + ... + 180206.

It is an arithmetic number, because the mean of its divisors is an integer number (94923180).

Almost surely, 2^1328431818 is an apocalyptic number.

1328431818 is an abundant number, since it is smaller than the sum of its proper divisors (1709109942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1328431818 is a wasteful number, since it uses less digits than its factorization.

1328431818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11742.

The product of its digits is 36864, while the sum is 39.

The square root of 1328431818 is about 36447.6586079271. The cubic root of 1328431818 is about 1099.2920563214.

The spelling of 1328431818 in words is "one billion, three hundred twenty-eight million, four hundred thirty-one thousand, eight hundred eighteen".