12831128 has 8 divisors (see below), whose sum is σ = 24058380. Its totient is φ = 6415560.

The previous prime is 12831127. The next prime is 12831131. The reversal of 12831128 is 82113821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12831097 and 12831106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12831127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801938 + ... + 801953.

Almost surely, 2^12831128 is an apocalyptic number.

It is an amenable number.

12831128 is a deficient number, since it is larger than the sum of its proper divisors (11227252).

12831128 is a wasteful number, since it uses less digits than its factorization.

12831128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603897 (or 1603893 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 12831128 is about 3582.0563926326. The cubic root of 12831128 is about 234.1108881019.

Adding to 12831128 its reverse (82113821), we get a palindrome (94944949).

The spelling of 12831128 in words is "twelve million, eight hundred thirty-one thousand, one hundred twenty-eight".