1328932343781 has 48 divisors (see below), whose sum is σ = 2216999809024. Its totient is φ = 751388908032.

The previous prime is 1328932343771. The next prime is 1328932343807. The reversal of 1328932343781 is 1873432398231.

It is a happy number.

1328932343781 is a `hidden beast` number, since 1 + 3 + 28 + 93 + 23 + 437 + 81 = 666.

It is not a de Polignac number, because 1328932343781 - 2⁹ = 1328932343269 is a prime.

It is a super-2 number, since 2×1328932343781² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328932343701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2761725 + ... + 3207021.

Almost surely, 2^{1328932343781} is an apocalyptic number.

It is an amenable number.

1328932343781 is a deficient number, since it is larger than the sum of its proper divisors (888067465243).

1328932343781 is a wasteful number, since it uses less digits than its factorization.

1328932343781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445810 (or 445807 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 1328932343781 in words is "one trillion, three hundred twenty-eight billion, nine hundred thirty-two million, three hundred forty-three thousand, seven hundred eighty-one".