13278946 has 8 divisors (see below), whose sum is σ = 20070864. Its totient is φ = 6588660.

The previous prime is 13278913. The next prime is 13278949. The reversal of 13278946 is 64987231.

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

It is a junction number, because it is equal to n+sod(n) for n = 13278899 and 13278908.

It is not an unprimeable number, because it can be changed into a prime (13278949) 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 3 ways as a sum of consecutive naturals, for example, 25080 + ... + 25603.

It is an arithmetic number, because the mean of its divisors is an integer number (2508858).

Almost surely, 2^13278946 is an apocalyptic number.

13278946 is a deficient number, since it is larger than the sum of its proper divisors (6791918).

13278946 is a wasteful number, since it uses less digits than its factorization.

13278946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50816.

The product of its digits is 72576, while the sum is 40.

The square root of 13278946 is about 3644.0288143756. The cubic root of 13278946 is about 236.8033643491.

The spelling of 13278946 in words is "thirteen million, two hundred seventy-eight thousand, nine hundred forty-six".