13609836 has 48 divisors (see below), whose sum is σ = 36825600. Its totient is φ = 4338576.

The previous prime is 13609831. The next prime is 13609847. The reversal of 13609836 is 63890631.

It is a happy number.

13609836 is a `hidden beast` number, since 13 + 609 + 8 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13609836.

It is not an unprimeable number, because it can be changed into a prime (13609831) 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, 256 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (767200).

Almost surely, 2^13609836 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 13609836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18412800).

13609836 is an abundant number, since it is smaller than the sum of its proper divisors (23215764).

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

13609836 is a wasteful number, since it uses less digits than its factorization.

13609836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515 (or 5507 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 13609836 is about 3689.1511218707. The cubic root of 13609836 is about 238.7541691294.

The spelling of 13609836 in words is "thirteen million, six hundred nine thousand, eight hundred thirty-six".