12000440520 has 128 divisors (see below), whose sum is σ = 40161744000. Its totient is φ = 3187296000.

The previous prime is 12000440503. The next prime is 12000440537. The reversal of 12000440520 is 2504400021.

12000440520 is a `hidden beast` number, since 1 + 200 + 0 + 440 + 5 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (12000440503) and next prime (12000440537).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12000440493 and 12000440502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248946 + ... + 293214.

It is an arithmetic number, because the mean of its divisors is an integer number (313763625).

Almost surely, 2^12000440520 is an apocalyptic number.

12000440520 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 12000440520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20080872000).

12000440520 is an abundant number, since it is smaller than the sum of its proper divisors (28161303480).

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

12000440520 is a wasteful number, since it uses less digits than its factorization.

12000440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44540 (or 44530 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 12000440520 its reverse (2504400021), we get a palindrome (14504840541).

The spelling of 12000440520 in words is "twelve billion, four hundred forty thousand, five hundred twenty".