12036840 has 64 divisors (see below), whose sum is σ = 37100160. Its totient is φ = 3121920.

The previous prime is 12036809. The next prime is 12036847. The reversal of 12036840 is 4863021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12036840.

It is not an unprimeable number, because it can be changed into a prime (12036847) 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, 3085 + ... + 5795.

It is an arithmetic number, because the mean of its divisors is an integer number (579690).

Almost surely, 2^12036840 is an apocalyptic number.

12036840 is a gapful number since it is divisible by the number (10) 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 12036840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18550080).

12036840 is an abundant number, since it is smaller than the sum of its proper divisors (25063320).

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

12036840 is a wasteful number, since it uses less digits than its factorization.

12036840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12036840 is about 3469.4149362681. The cubic root of 12036840 is about 229.1768940156.

Adding to 12036840 its reverse (4863021), we get a palindrome (16899861).

The spelling of 12036840 in words is "twelve million, thirty-six thousand, eight hundred forty".