12744378 has 28 divisors (see below), whose sum is σ = 28665018. Its totient is φ = 4247640.

The previous prime is 12744377. The next prime is 12744397. The reversal of 12744378 is 87344721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12131289 + 613089 = 3483^2 + 783^2 .

It is not an unprimeable number, because it can be changed into a prime (12744377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2913 + ... + 5828.

Almost surely, 2^12744378 is an apocalyptic number.

12744378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12744378 is an abundant number, since it is smaller than the sum of its proper divisors (15920640).

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

12744378 is an frugal number, since it uses more digits than its factorization.

12744378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761 (or 8746 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 12744378 is about 3569.9268900077. The cubic root of 12744378 is about 233.5820943342.

The spelling of 12744378 in words is "twelve million, seven hundred forty-four thousand, three hundred seventy-eight".