13880378 has 4 divisors (see below), whose sum is σ = 20820570. Its totient is φ = 6940188.

The previous prime is 13880371. The next prime is 13880407. The reversal of 13880378 is 87308831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87308831 = 163 ⋅535637.

It can be written as a sum of positive squares in only one way, i.e., 10220809 + 3659569 = 3197^2 + 1913^2 .

It is not an unprimeable number, because it can be changed into a prime (13880371) 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 as a sum of consecutive naturals, namely, 3470093 + ... + 3470096.

Almost surely, 2^13880378 is an apocalyptic number.

13880378 is a deficient number, since it is larger than the sum of its proper divisors (6940192).

13880378 is an equidigital number, since it uses as much as digits as its factorization.

13880378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940191.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 13880378 is about 3725.6379319521. The cubic root of 13880378 is about 240.3258190487.

The spelling of 13880378 in words is "thirteen million, eight hundred eighty thousand, three hundred seventy-eight".