12128536 has 32 divisors (see below), whose sum is σ = 27360000. Its totient is φ = 4923936.

The previous prime is 12128513. The next prime is 12128561. The reversal of 12128536 is 63582121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4636 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (855000).

Almost surely, 2^12128536 is an apocalyptic number.

It is an amenable number.

12128536 is an abundant number, since it is smaller than the sum of its proper divisors (15231464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12128536 is a wasteful number, since it uses less digits than its factorization.

12128536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11431 (or 11427 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 12128536 is about 3482.6047722933. The cubic root of 12128536 is about 229.7573748966.

The spelling of 12128536 in words is "twelve million, one hundred twenty-eight thousand, five hundred thirty-six".