12225282440 has 96 divisors (see below), whose sum is σ = 32023512000. Its totient is φ = 4188159360.

The previous prime is 12225282439. The next prime is 12225282451. The reversal of 12225282440 is 4428252221.

It is a junction number, because it is equal to n+sod(n) for n = 12225282397 and 12225282406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4528211 + ... + 4530909.

It is an arithmetic number, because the mean of its divisors is an integer number (333578250).

Almost surely, 2^12225282440 is an apocalyptic number.

12225282440 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 12225282440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16011756000).

12225282440 is an abundant number, since it is smaller than the sum of its proper divisors (19798229560).

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

12225282440 is a wasteful number, since it uses less digits than its factorization.

12225282440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5024 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 32.

The spelling of 12225282440 in words is "twelve billion, two hundred twenty-five million, two hundred eighty-two thousand, four hundred forty".