13278394 has 12 divisors (see below), whose sum is σ = 21159054. Its totient is φ = 6248384.

The previous prime is 13278389. The next prime is 13278401. The reversal of 13278394 is 49387231.

It can be written as a sum of positive squares in 3 ways, for example, as 13227769 + 50625 = 3637^2 + 225^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 10909 + ... + 12064.

Almost surely, 2^13278394 is an apocalyptic number.

13278394 is a deficient number, since it is larger than the sum of its proper divisors (7880660).

13278394 is a wasteful number, since it uses less digits than its factorization.

13278394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23009 (or 22992 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 13278394 is about 3643.9530732434. The cubic root of 13278394 is about 236.8000830328.

The spelling of 13278394 in words is "thirteen million, two hundred seventy-eight thousand, three hundred ninety-four".