12002452440 has 128 divisors (see below), whose sum is σ = 39541547520. Its totient is φ = 2890368000.

The previous prime is 12002452439. The next prime is 12002452477. The reversal of 12002452440 is 4425420021.

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 12002452440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169212 + ... + 229428.

It is an arithmetic number, because the mean of its divisors is an integer number (308918340).

Almost surely, 2^12002452440 is an apocalyptic number.

12002452440 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 12002452440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19770773760).

12002452440 is an abundant number, since it is smaller than the sum of its proper divisors (27539095080).

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

12002452440 is a wasteful number, since it uses less digits than its factorization.

12002452440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60393 (or 60389 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 12002452440 its reverse (4425420021), we get a palindrome (16427872461).

The spelling of 12002452440 in words is "twelve billion, two million, four hundred fifty-two thousand, four hundred forty".