1328431086 has 12 divisors (see below), whose sum is σ = 2878267392. Its totient is φ = 442810356.

The previous prime is 1328431063. The next prime is 1328431103. The reversal of 1328431086 is 6801348231.

It is a super-2 number, since 2×1328431086² = 3529458300502278792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1328431086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36900846 + ... + 36900881.

It is an arithmetic number, because the mean of its divisors is an integer number (239855616).

Almost surely, 2^1328431086 is an apocalyptic number.

1328431086 is an abundant number, since it is smaller than the sum of its proper divisors (1549836306).

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

1328431086 is a wasteful number, since it uses less digits than its factorization.

1328431086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73801735 (or 73801732 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1328431086 is about 36447.6485661284. The cubic root of 1328431086 is about 1099.2918544087.

The spelling of 1328431086 in words is "one billion, three hundred twenty-eight million, four hundred thirty-one thousand, eighty-six".