1224004404400 has 120 divisors (see below), whose sum is σ = 3070537535520. Its totient is φ = 468007710720.

The previous prime is 1224004404391. The next prime is 1224004404409. The reversal of 1224004404400 is 44044004221.

It is an interprime number because it is at equal distance from previous prime (1224004404391) and next prime (1224004404409).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1224004404409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14244766 + ... + 14330434.

It is an arithmetic number, because the mean of its divisors is an integer number (25587812796).

Almost surely, 2^{1224004404400} is an apocalyptic number.

1224004404400 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 1224004404400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535268767760).

1224004404400 is an abundant number, since it is smaller than the sum of its proper divisors (1846533131120).

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

1224004404400 is a wasteful number, since it uses less digits than its factorization.

1224004404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87263 (or 87252 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 1224004404400 its reverse (44044004221), we get a palindrome (1268048408621).

The spelling of 1224004404400 in words is "one trillion, two hundred twenty-four billion, four million, four hundred four thousand, four hundred".