13431128 has 8 divisors (see below), whose sum is σ = 25183380. Its totient is φ = 6715560.

The previous prime is 13431127. The next prime is 13431133. The reversal of 13431128 is 82113431.

13431128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839438 + ... + 839453.

Almost surely, 2^13431128 is an apocalyptic number.

It is an amenable number.

13431128 is a deficient number, since it is larger than the sum of its proper divisors (11752252).

13431128 is a wasteful number, since it uses less digits than its factorization.

13431128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678897 (or 1678893 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 13431128 is about 3664.8503380084. The cubic root of 13431128 is about 237.7045506467.

Adding to 13431128 its reverse (82113431), we get a palindrome (95544559).

The spelling of 13431128 in words is "thirteen million, four hundred thirty-one thousand, one hundred twenty-eight".