13813236 has 36 divisors (see below), whose sum is σ = 35076132. Its totient is φ = 4583424.

The previous prime is 13813223. The next prime is 13813237. The reversal of 13813236 is 63231831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13003236 + 810000 = 3606^2 + 900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13813237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8506 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (974337).

Almost surely, 2^13813236 is an apocalyptic number.

It is an amenable number.

13813236 is an abundant number, since it is smaller than the sum of its proper divisors (21262896).

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

13813236 is a wasteful number, since it uses less digits than its factorization.

13813236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760 (or 1755 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13813236 is about 3716.6162029459. The cubic root of 13813236 is about 239.9376921586.

The spelling of 13813236 in words is "thirteen million, eight hundred thirteen thousand, two hundred thirty-six".