13878788 has 24 divisors (see below), whose sum is σ = 30281664. Its totient is φ = 5407200.

The previous prime is 13878779. The next prime is 13878803. The reversal of 13878788 is 88787831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22223 + ... + 22838.

It is an arithmetic number, because the mean of its divisors is an integer number (1261736).

Almost surely, 2^13878788 is an apocalyptic number.

It is an amenable number.

13878788 is an abundant number, since it is smaller than the sum of its proper divisors (16402876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13878788 is a wasteful number, since it uses less digits than its factorization.

13878788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45083 (or 45081 counting only the distinct ones).

The product of its digits is 602112, while the sum is 50.

The square root of 13878788 is about 3725.4245395659. The cubic root of 13878788 is about 240.3166422418.

The spelling of 13878788 in words is "thirteen million, eight hundred seventy-eight thousand, seven hundred eighty-eight".