12209536 has 64 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 5529600.

The previous prime is 12209521. The next prime is 12209563. The reversal of 12209536 is 63590221.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67366 + ... + 67546.

It is an arithmetic number, because the mean of its divisors is an integer number (417690).

Almost surely, 2^12209536 is an apocalyptic number.

12209536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12209536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13366080).

12209536 is an abundant number, since it is smaller than the sum of its proper divisors (14522624).

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

12209536 is a wasteful number, since it uses less digits than its factorization.

12209536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 12209536 is about 3494.2146470988. The cubic root of 12209536 is about 230.2677159876.

Adding to 12209536 its reverse (63590221), we get a palindrome (75799757).

The spelling of 12209536 in words is "twelve million, two hundred nine thousand, five hundred thirty-six".