1328668231 has 16 divisors (see below), whose sum is σ = 1466807328. Its totient is φ = 1193472000.

The previous prime is 1328668217. The next prime is 1328668247.

1328668231 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328668231 is a prime.

It is a super-2 number, since 2×1328668231² = 3530718536137338722, which contains 22 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 (1328668291) 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, 746815 + ... + 748591.

It is an arithmetic number, because the mean of its divisors is an integer number (91675458).

Almost surely, 2^1328668231 is an apocalyptic number.

1328668231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1328668231 is a deficient number, since it is larger than the sum of its proper divisors (138139097).

1328668231 is a wasteful number, since it uses less digits than its factorization.

1328668231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562.

The product of its digits is 82944, while the sum is 40.

The square root of 1328668231 is about 36450.9016486561. The cubic root of 1328668231 is about 1099.3572639128.

The spelling of 1328668231 in words is "one billion, three hundred twenty-eight million, six hundred sixty-eight thousand, two hundred thirty-one".