13778136 has 48 divisors (see below), whose sum is σ = 38525760. Its totient is φ = 4443840.

The previous prime is 13778123. The next prime is 13778147. The reversal of 13778136 is 63187731.

13778136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13778136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 855 + ... + 5318.

It is an arithmetic number, because the mean of its divisors is an integer number (802620).

Almost surely, 2^13778136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13778136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19262880).

13778136 is an abundant number, since it is smaller than the sum of its proper divisors (24747624).

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

13778136 is a wasteful number, since it uses less digits than its factorization.

13778136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216 (or 6209 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 13778136 is about 3711.8911621975. The cubic root of 13778136 is about 239.7342892661.

The spelling of 13778136 in words is "thirteen million, seven hundred seventy-eight thousand, one hundred thirty-six".