12738730 has 16 divisors (see below), whose sum is σ = 23550120. Its totient is φ = 4957632.

The previous prime is 12738727. The next prime is 12738779. The reversal of 12738730 is 3783721.

It can be written as a sum of positive squares in 4 ways, for example, as 10569001 + 2169729 = 3251^2 + 1473^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12738692 and 12738701.

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, 16845 + ... + 17584.

Almost surely, 2^12738730 is an apocalyptic number.

12738730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12738730 is a deficient number, since it is larger than the sum of its proper divisors (10811390).

12738730 is a wasteful number, since it uses less digits than its factorization.

12738730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34473.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 12738730 is about 3569.1357497299. The cubic root of 12738730 is about 233.5475832579.

The spelling of 12738730 in words is "twelve million, seven hundred thirty-eight thousand, seven hundred thirty".