12730778 has 8 divisors (see below), whose sum is σ = 19169568. Its totient is φ = 6340924.

The previous prime is 12730777. The next prime is 12730793. The reversal of 12730778 is 87703721.

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 (12730777) 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, 11576 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (2396196).

Almost surely, 2^12730778 is an apocalyptic number.

12730778 is a deficient number, since it is larger than the sum of its proper divisors (6438790).

12730778 is a wasteful number, since it uses less digits than its factorization.

12730778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24468.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 12730778 is about 3568.0215806522. The cubic root of 12730778 is about 233.4989767130.

The spelling of 12730778 in words is "twelve million, seven hundred thirty thousand, seven hundred seventy-eight".