13878936 has 144 divisors (see below), whose sum is σ = 43102800. Its totient is φ = 4021248.

The previous prime is 13878929. The next prime is 13878937. The reversal of 13878936 is 63987831.

It is a happy number.

13878936 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13878891 and 13878900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878937) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 478570 + ... + 478598.

It is an arithmetic number, because the mean of its divisors is an integer number (299325).

Almost surely, 2^13878936 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 13878936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21551400).

13878936 is an abundant number, since it is smaller than the sum of its proper divisors (29223864).

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

13878936 is a wasteful number, since it uses less digits than its factorization.

13878936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 74 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13878936 is about 3725.4444030209. Note that the first 4 decimals coincide. The cubic root of 13878936 is about 240.3174964648.

The spelling of 13878936 in words is "thirteen million, eight hundred seventy-eight thousand, nine hundred thirty-six".