13888749 has 16 divisors (see below), whose sum is σ = 21241472. Its totient is φ = 7907328.

The previous prime is 13888723. The next prime is 13888759. The reversal of 13888749 is 94788831.

13888749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13888749 - 2¹² = 13884653 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13888698 and 13888707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5517 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (1327592).

Almost surely, 2^13888749 is an apocalyptic number.

It is an amenable number.

13888749 is a deficient number, since it is larger than the sum of its proper divisors (7352723).

13888749 is a wasteful number, since it uses less digits than its factorization.

13888749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436.

The product of its digits is 387072, while the sum is 48.

The square root of 13888749 is about 3726.7611943885. The cubic root of 13888749 is about 240.3741213631.

The spelling of 13888749 in words is "thirteen million, eight hundred eighty-eight thousand, seven hundred forty-nine".