12730378 has 8 divisors (see below), whose sum is σ = 19206468. Its totient is φ = 6328224.

The previous prime is 12730363. The next prime is 12730379. The reversal of 12730378 is 87303721.

It can be written as a sum of positive squares in 2 ways, for example, as 12723489 + 6889 = 3567^2 + 83^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12730379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18051 + ... + 18742.

Almost surely, 2^12730378 is an apocalyptic number.

12730378 is a deficient number, since it is larger than the sum of its proper divisors (6476090).

12730378 is a wasteful number, since it uses less digits than its factorization.

12730378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36968.

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

The square root of 12730378 is about 3567.9655267393. The cubic root of 12730378 is about 233.4965311811.

The spelling of 12730378 in words is "twelve million, seven hundred thirty thousand, three hundred seventy-eight".