13788478 has 8 divisors (see below), whose sum is σ = 22563000. Its totient is φ = 6267480.

The previous prime is 13788469. The next prime is 13788487. The reversal of 13788478 is 87488731.

It is an interprime number because it is at equal distance from previous prime (13788469) and next prime (13788487).

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

It is a congruent number.

It is an unprimeable number.

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, 313353 + ... + 313396.

It is an arithmetic number, because the mean of its divisors is an integer number (2820375).

Almost surely, 2^13788478 is an apocalyptic number.

13788478 is a deficient number, since it is larger than the sum of its proper divisors (8774522).

13788478 is a wasteful number, since it uses less digits than its factorization.

13788478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626762.

The product of its digits is 301056, while the sum is 46.

The square root of 13788478 is about 3713.2839912940. The cubic root of 13788478 is about 239.7942565442.

The spelling of 13788478 in words is "thirteen million, seven hundred eighty-eight thousand, four hundred seventy-eight".