3128128441 has 4 divisors (see below), whose sum is σ = 3292766800. Its totient is φ = 2963490084.

The previous prime is 3128128429. The next prime is 3128128447. The reversal of 3128128441 is 1448218213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3128128441 - 2¹³ = 3128120249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3128128397 and 3128128406.

It is not an unprimeable number, because it can be changed into a prime (3128128447) 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, 82319151 + ... + 82319188.

It is an arithmetic number, because the mean of its divisors is an integer number (823191700).

Almost surely, 2^3128128441 is an apocalyptic number.

It is an amenable number.

3128128441 is a deficient number, since it is larger than the sum of its proper divisors (164638359).

3128128441 is a wasteful number, since it uses less digits than its factorization.

3128128441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164638358.

The product of its digits is 12288, while the sum is 34.

The square root of 3128128441 is about 55929.6740648468. The cubic root of 3128128441 is about 1462.4965792990.

The spelling of 3128128441 in words is "three billion, one hundred twenty-eight million, one hundred twenty-eight thousand, four hundred forty-one".