13788778 has 8 divisors (see below), whose sum is σ = 20738880. Its totient is φ = 6875820.

The previous prime is 13788773. The next prime is 13788779. The reversal of 13788778 is 87788731.

13788778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13788773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8338 + ... + 9853.

It is an arithmetic number, because the mean of its divisors is an integer number (2592360).

Almost surely, 2^13788778 is an apocalyptic number.

13788778 is a deficient number, since it is larger than the sum of its proper divisors (6950102).

13788778 is a wasteful number, since it uses less digits than its factorization.

13788778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18572.

The product of its digits is 526848, while the sum is 49.

The square root of 13788778 is about 3713.3243865841. The cubic root of 13788778 is about 239.7959956232.

The spelling of 13788778 in words is "thirteen million, seven hundred eighty-eight thousand, seven hundred seventy-eight".