13865388 has 12 divisors (see below), whose sum is σ = 32352600. Its totient is φ = 4621792.

The previous prime is 13865363. The next prime is 13865419. The reversal of 13865388 is 88356831.

13865388 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 tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577713 + ... + 577736.

It is an arithmetic number, because the mean of its divisors is an integer number (2696050).

Almost surely, 2^13865388 is an apocalyptic number.

It is an amenable number.

13865388 is an abundant number, since it is smaller than the sum of its proper divisors (18487212).

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

13865388 is a wasteful number, since it uses less digits than its factorization.

13865388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155456 (or 1155454 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 13865388 is about 3723.6256525059. The cubic root of 13865388 is about 240.2392752569.

The spelling of 13865388 in words is "thirteen million, eight hundred sixty-five thousand, three hundred eighty-eight".