13645236 has 48 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 4103520.

The previous prime is 13645223. The next prime is 13645259. The reversal of 13645236 is 63254631.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21735 + ... + 22353.

It is an arithmetic number, because the mean of its divisors is an integer number (729120).

Almost surely, 2^13645236 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 13645236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17498880).

13645236 is an abundant number, since it is smaller than the sum of its proper divisors (21352524).

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

13645236 is a wasteful number, since it uses less digits than its factorization.

13645236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 802 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 13645236 is about 3693.9458577516. The cubic root of 13645236 is about 238.9609945507.

Adding to 13645236 its reverse (63254631), we get a palindrome (76899867).

The spelling of 13645236 in words is "thirteen million, six hundred forty-five thousand, two hundred thirty-six".