2128393943 has 12 divisors (see below), whose sum is σ = 2309994360. Its totient is φ = 1960167456.

The previous prime is 2128393937. The next prime is 2128393979. The reversal of 2128393943 is 3493938212.

It is not a de Polignac number, because 2128393943 - 2¹⁰ = 2128392919 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2128393894 and 2128393903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128393643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60653 + ... + 89081.

It is an arithmetic number, because the mean of its divisors is an integer number (192499530).

Almost surely, 2^2128393943 is an apocalyptic number.

2128393943 is a deficient number, since it is larger than the sum of its proper divisors (181600417).

2128393943 is a wasteful number, since it uses less digits than its factorization.

2128393943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28898 (or 28885 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 2128393943 is about 46134.5200798708. The cubic root of 2128393943 is about 1286.3248848413.

The spelling of 2128393943 in words is "two billion, one hundred twenty-eight million, three hundred ninety-three thousand, nine hundred forty-three".