1244440120 has 128 divisors (see below), whose sum is σ = 3696399360. Its totient is φ = 365045760.

The previous prime is 1244440039. The next prime is 1244440151. The reversal of 1244440120 is 210444421.

It is a super-2 number, since 2×1244440120² = 3097262424531228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1244440091 and 1244440100.

It is a congruent number.

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, 40477 + ... + 64243.

It is an arithmetic number, because the mean of its divisors is an integer number (28878120).

Almost surely, 2^1244440120 is an apocalyptic number.

1244440120 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 1244440120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848199680).

1244440120 is an abundant number, since it is smaller than the sum of its proper divisors (2451959240).

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

1244440120 is a wasteful number, since it uses less digits than its factorization.

1244440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23813 (or 23809 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1244440120 is about 35276.6228542359. The cubic root of 1244440120 is about 1075.6178514228.

Adding to 1244440120 its reverse (210444421), we get a palindrome (1454884541).

It can be divided in two parts, 12444401 and 20, that added together give a palindrome (12444421).

The spelling of 1244440120 in words is "one billion, two hundred forty-four million, four hundred forty thousand, one hundred twenty".