12729378 has 16 divisors (see below), whose sum is σ = 25766496. Its totient is φ = 4191840.

The previous prime is 12729361. The next prime is 12729383. The reversal of 12729378 is 87392721.

It is a Curzon 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, 12283 + ... + 13278.

It is an arithmetic number, because the mean of its divisors is an integer number (1610406).

Almost surely, 2^12729378 is an apocalyptic number.

12729378 is an abundant number, since it is smaller than the sum of its proper divisors (13037118).

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

12729378 is a wasteful number, since it uses less digits than its factorization.

12729378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25649.

The product of its digits is 42336, while the sum is 39.

The square root of 12729378 is about 3567.8253881041. The cubic root of 12729378 is about 233.4904171274.

The spelling of 12729378 in words is "twelve million, seven hundred twenty-nine thousand, three hundred seventy-eight".