12289536 has 160 divisors (see below), whose sum is σ = 41902080. Its totient is φ = 3483648.

The previous prime is 12289531. The next prime is 12289559. The reversal of 12289536 is 63598221.

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12289536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289531) 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, 96705 + ... + 96831.

It is an arithmetic number, because the mean of its divisors is an integer number (261888).

Almost surely, 2^12289536 is an apocalyptic number.

12289536 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 12289536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20951040).

12289536 is an abundant number, since it is smaller than the sum of its proper divisors (29612544).

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

12289536 is an equidigital number, since it uses as much as digits as its factorization.

12289536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 139 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 12289536 is about 3505.6434502100. The cubic root of 12289536 is about 230.7695458457.

The spelling of 12289536 in words is "twelve million, two hundred eighty-nine thousand, five hundred thirty-six".