1244424120400 has 60 divisors (see below), whose sum is σ = 3001362383772. Its totient is φ = 495832760320.

The previous prime is 1244424120347. The next prime is 1244424120413. The reversal of 1244424120400 is 40214244421.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 30557836864 + 1213866283536 = 174808^2 + 1101756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5949847 + ... + 6155446.

Almost surely, 2^{1244424120400} is an apocalyptic number.

1244424120400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244424120400 is an abundant number, since it is smaller than the sum of its proper divisors (1756938263372).

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

1244424120400 is a wasteful number, since it uses less digits than its factorization.

1244424120400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12105568 (or 12105557 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 1244424120400 its reverse (40214244421), we get a palindrome (1284638364821).

The spelling of 1244424120400 in words is "one trillion, two hundred forty-four billion, four hundred twenty-four million, one hundred twenty thousand, four hundred".