13128436 has 12 divisors (see below), whose sum is σ = 23143428. Its totient is φ = 6516032.

The previous prime is 13128433. The next prime is 13128443. The reversal of 13128436 is 63482131.

It can be written as a sum of positive squares in 2 ways, for example, as 9302500 + 3825936 = 3050^2 + 1956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128431) 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 in 3 ways as a sum of consecutive naturals, for example, 11431 + ... + 12526.

It is an arithmetic number, because the mean of its divisors is an integer number (1928619).

Almost surely, 2^13128436 is an apocalyptic number.

It is an amenable number.

13128436 is a deficient number, since it is larger than the sum of its proper divisors (10014992).

13128436 is a wasteful number, since it uses less digits than its factorization.

13128436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24098 (or 24096 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 13128436 is about 3623.3183685677. The cubic root of 13128436 is about 235.9052813424.

The spelling of 13128436 in words is "thirteen million, one hundred twenty-eight thousand, four hundred thirty-six".