13809478 has 8 divisors (see below), whose sum is σ = 20734272. Its totient is φ = 6898056.

The previous prime is 13809461. The next prime is 13809479. The reversal of 13809478 is 87490831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13809478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809479) 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, 150 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (2591784).

Almost surely, 2^13809478 is an apocalyptic number.

13809478 is a deficient number, since it is larger than the sum of its proper divisors (6924794).

13809478 is a wasteful number, since it uses less digits than its factorization.

13809478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6686.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 13809478 is about 3716.1106011528. The cubic root of 13809478 is about 239.9159312034.

The spelling of 13809478 in words is "thirteen million, eight hundred nine thousand, four hundred seventy-eight".