1328398471 has 4 divisors (see below), whose sum is σ = 1398314200. Its totient is φ = 1258482744.

The previous prime is 1328398469. The next prime is 1328398493. The reversal of 1328398471 is 1748938231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1328398471 - 2¹ = 1328398469 is a prime.

It is a super-3 number, since 3×1328398471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328398451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34957836 + ... + 34957873.

It is an arithmetic number, because the mean of its divisors is an integer number (349578550).

Almost surely, 2^1328398471 is an apocalyptic number.

1328398471 is a deficient number, since it is larger than the sum of its proper divisors (69915729).

1328398471 is an equidigital number, since it uses as much as digits as its factorization.

1328398471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69915728.

The product of its digits is 290304, while the sum is 46.

The square root of 1328398471 is about 36447.2011408284. The cubic root of 1328398471 is about 1099.2828579071.

The spelling of 1328398471 in words is "one billion, three hundred twenty-eight million, three hundred ninety-eight thousand, four hundred seventy-one".