13505378 has 8 divisors (see below), whose sum is σ = 21449772. Its totient is φ = 6355456.

The previous prime is 13505377. The next prime is 13505381. The reversal of 13505378 is 87350531.

It can be written as a sum of positive squares in 2 ways, for example, as 12837889 + 667489 = 3583^2 + 817^2 .

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 (13505377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198575 + ... + 198642.

Almost surely, 2^13505378 is an apocalyptic number.

13505378 is a deficient number, since it is larger than the sum of its proper divisors (7944394).

13505378 is a wasteful number, since it uses less digits than its factorization.

13505378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397236.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 13505378 is about 3674.9663944042. The cubic root of 13505378 is about 238.1417722748.

The spelling of 13505378 in words is "thirteen million, five hundred five thousand, three hundred seventy-eight".