3128389231 has 16 divisors (see below), whose sum is σ = 3533188608. Its totient is φ = 2745316800.

The previous prime is 3128389207. The next prime is 3128389241. The reversal of 3128389231 is 1329838213.

It is a cyclic number.

It is not a de Polignac number, because 3128389231 - 2⁹ = 3128388719 is a prime.

It is a super-2 number, since 2×3128389231² = 19573638361273542722, 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 (3128389241) 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, 3705 + ... + 79186.

It is an arithmetic number, because the mean of its divisors is an integer number (220824288).

Almost surely, 2^3128389231 is an apocalyptic number.

3128389231 is a deficient number, since it is larger than the sum of its proper divisors (404799377).

3128389231 is a wasteful number, since it uses less digits than its factorization.

3128389231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83022.

The product of its digits is 62208, while the sum is 40.

The square root of 3128389231 is about 55932.0054262316. The cubic root of 3128389231 is about 1462.5372206272.

The spelling of 3128389231 in words is "three billion, one hundred twenty-eight million, three hundred eighty-nine thousand, two hundred thirty-one".