12640352 has 24 divisors (see below), whose sum is σ = 25138512. Its totient is φ = 6256000.

The previous prime is 12640351. The next prime is 12640373. The reversal of 12640352 is 25304621.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277 + ... + 5187.

It is an arithmetic number, because the mean of its divisors is an integer number (1047438).

Almost surely, 2^12640352 is an apocalyptic number.

It is an amenable number.

12640352 is a deficient number, since it is larger than the sum of its proper divisors (12498160).

12640352 is a wasteful number, since it uses less digits than its factorization.

12640352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 12640352 is about 3555.3272704492. The cubic root of 12640352 is about 232.9448192192.

Adding to 12640352 its reverse (25304621), we get a palindrome (37944973).

The spelling of 12640352 in words is "twelve million, six hundred forty thousand, three hundred fifty-two".