13838645 has 4 divisors (see below), whose sum is σ = 16606380. Its totient is φ = 11070912.

The previous prime is 13838641. The next prime is 13838651. The reversal of 13838645 is 54683831.

13838645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54683831 = 43 ⋅1271717.

It can be written as a sum of positive squares in 2 ways, for example, as 2961841 + 10876804 = 1721^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 13838645 - 2² = 13838641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13838599 and 13838608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13838641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383860 + ... + 1383869.

It is an arithmetic number, because the mean of its divisors is an integer number (4151595).

Almost surely, 2^13838645 is an apocalyptic number.

It is an amenable number.

13838645 is a deficient number, since it is larger than the sum of its proper divisors (2767735).

13838645 is an equidigital number, since it uses as much as digits as its factorization.

13838645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767734.

The product of its digits is 69120, while the sum is 38.

The square root of 13838645 is about 3720.0329299618. The cubic root of 13838645 is about 240.0847212468.

It can be divided in two parts, 138 and 38645, that added together give a palindrome (38783).

The spelling of 13838645 in words is "thirteen million, eight hundred thirty-eight thousand, six hundred forty-five".