13378478 has 4 divisors (see below), whose sum is σ = 20067720. Its totient is φ = 6689238.

The previous prime is 13378429. The next prime is 13378487. The reversal of 13378478 is 87487331.

13378478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87487331 = 23 ⋅3803797.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344618 + ... + 3344621.

It is an arithmetic number, because the mean of its divisors is an integer number (5016930).

Almost surely, 2^13378478 is an apocalyptic number.

13378478 is a deficient number, since it is larger than the sum of its proper divisors (6689242).

13378478 is an equidigital number, since it uses as much as digits as its factorization.

13378478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6689241.

The product of its digits is 112896, while the sum is 41.

The square root of 13378478 is about 3657.6601810447. The cubic root of 13378478 is about 237.3935434250.

The spelling of 13378478 in words is "thirteen million, three hundred seventy-eight thousand, four hundred seventy-eight".