1224454440 has 128 divisors (see below), whose sum is σ = 4043260800. Its totient is φ = 294174720.

The previous prime is 1224454433. The next prime is 1224454459. The reversal of 1224454440 is 444544221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1224454398 and 1224454407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145056 + ... + 153264.

It is an arithmetic number, because the mean of its divisors is an integer number (31587975).

Almost surely, 2^1224454440 is an apocalyptic number.

1224454440 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 1224454440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021630400).

1224454440 is an abundant number, since it is smaller than the sum of its proper divisors (2818806360).

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

1224454440 is a wasteful number, since it uses less digits than its factorization.

1224454440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347 (or 8343 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

The square root of 1224454440 is about 34992.2054177784. The cubic root of 1224454440 is about 1069.8286155178.

Adding to 1224454440 its reverse (444544221), we get a palindrome (1668998661).

The spelling of 1224454440 in words is "one billion, two hundred twenty-four million, four hundred fifty-four thousand, four hundred forty".