13999378 has 8 divisors (see below), whose sum is σ = 21343500. Its totient is φ = 6884880.

The previous prime is 13999369. The next prime is 13999393. The reversal of 13999378 is 87399931.

13999378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11512449 + 2486929 = 3393^2 + 1577^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57253 + ... + 57496.

Almost surely, 2^13999378 is an apocalyptic number.

13999378 is a deficient number, since it is larger than the sum of its proper divisors (7344122).

13999378 is a wasteful number, since it uses less digits than its factorization.

13999378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114812.

The product of its digits is 367416, while the sum is 49.

The square root of 13999378 is about 3741.5742676045. The cubic root of 13999378 is about 241.0106570587.

The spelling of 13999378 in words is "thirteen million, nine hundred ninety-nine thousand, three hundred seventy-eight".